Update dependency bazel_skylib to v1.6.1 (#318)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| bazel_skylib | bazel_dep | minor | `1.5.0` -> `1.6.1` |
| [bazel_skylib](https://togithub.com/bazelbuild/bazel-skylib) |
http_archive | minor | `1.5.0` -> `1.6.1` |

---

### Release Notes

<details>
<summary>bazelbuild/bazel-skylib (bazel_skylib)</summary>

###
[`v1.6.1`](https://togithub.com/bazelbuild/bazel-skylib/compare/1.6.0...1.6.1)

[Compare
Source](https://togithub.com/bazelbuild/bazel-skylib/compare/1.6.0...1.6.1)

###
[`v1.6.0`](https://togithub.com/bazelbuild/bazel-skylib/releases/tag/1.6.0)

[Compare
Source](https://togithub.com/bazelbuild/bazel-skylib/compare/1.5.0...1.6.0)

Release 1.6.0

#### What's Changed

- Add helper functions for module extensions as `modules` by
[@&#8203;fmeum](https://togithub.com/fmeum) in
[bazelbuild/bazel-skylib#457
- Make `out` on `native_binary` optional by
[@&#8203;tpudlik](https://togithub.com/tpudlik) in
[bazelbuild/bazel-skylib#474
- Remove outdated rules_cc dependency
[@&#8203;cpsauer](https://togithub.com/cpsauer) in
[bazelbuild/bazel-skylib#476
- Add toolchains argument to unittests.make by
[@&#8203;jylinv0](https://togithub.com/jylinv0) in
[bazelbuild/bazel-skylib#483
- Allow `bzl_library` to depend on non-`bzl_library` targets by
[@&#8203;Wyverald](https://togithub.com/Wyverald) in
[bazelbuild/bazel-skylib#495

#### New Contributors

- [@&#8203;jylinv0](https://togithub.com/jylinv0) made their first
contribution in
[bazelbuild/bazel-skylib#483
- [@&#8203;tpudlik](https://togithub.com/tpudlik) made their first
contribution in
[bazelbuild/bazel-skylib#474

**Full Changelog**:
bazelbuild/bazel-skylib@1.5.0...1.6.0

<!--## MODULE.bazel setup

```starlark
bazel_dep(name = "bazel_skylib", version = "1.6.0")

### If the Gazelle plugin is needed:
bazel_dep(name = "bazel_skylib_gazelle_plugin", version = "1.6.0", dev_dependency = True)
```-->

#### WORKSPACE setup

load("@&#8203;bazel_tools//tools/build_defs/repo:http.bzl",
"http_archive")

    http_archive(
        name = "bazel_skylib",
sha256 =
"41449d7c7372d2e270e8504dfab09ee974325b0b40fdd98172c7fbe257b8bcc9"
        urls = [

"https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.6.0/bazel-skylib-1.6.0.tar.gz",

"https://github.com/bazelbuild/bazel-skylib/releases/download/1.6.0/bazel-skylib-1.6.0.tar.gz",
        ],
    )

load("@&#8203;bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")

    bazel_skylib_workspace()

***Additional WORKSPACE setup for the Gazelle plugin***

```starlark
http_archive(
    name = "bazel_skylib_gazelle_plugin",
    sha256 = "8700f9204f3b0a32851cdf56c63b8d8d4fcf93b96707c590d1de8d84cf07ee7d",
    urls = [
        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.6.0/bazel-skylib-gazelle-plugin-1.6.0.tar.gz",
        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.6.0/bazel-skylib-gazelle-plugin-1.6.0.tar.gz",
    ],
)

load("@&#8203;bazel_skylib_gazelle_plugin//:workspace.bzl", "bazel_skylib_gazelle_plugin_workspace")

bazel_skylib_gazelle_plugin_workspace()

load("@&#8203;bazel_skylib_gazelle_plugin//:setup.bzl", "bazel_skylib_gazelle_plugin_setup")

bazel_skylib_gazelle_plugin_setup()
```

**Using the rules**

See [the
source](https://togithub.com/bazelbuild/bazel-skylib/tree/1.6.0).

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about these
updates again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/bazel-contrib/toolchains_llvm).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zMTMuMSIsInVwZGF0ZWRJblZlciI6IjM3LjMyMS4yIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

tests/MODULE.bazel

@@ -20,7 +20,7 @@ local_path_override(
     path = "..",
 )
 
-bazel_dep(name = "bazel_skylib", version = "1.5.0")
+bazel_dep(name = "bazel_skylib", version = "1.6.1")
 bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "rules_cc", version = "0.0.9")
 bazel_dep(name = "rules_go", version = "0.47.1", repo_name = "io_bazel_rules_go")

toolchain/deps.bzl

@@ -29,10 +29,10 @@ def bazel_toolchain_dependencies():
         http_archive(
             name = "bazel_skylib",
             urls = [
-                "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.5.0/bazel-skylib-1.5.0.tar.gz",
-                "https://github.com/bazelbuild/bazel-skylib/releases/download/1.5.0/bazel-skylib-1.5.0.tar.gz",
+                "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
+                "https://github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
             ],
-            sha256 = "cd55a062e763b9349921f0f5db8c3933288dc8ba4f76dd9416aac68acee3cb94",
+            sha256 = "9f38886a40548c6e96c106b752f242130ee11aaa068a56ba7e56f4511f33e4f2",
         )
 
         # Skip bazel_skylib_workspace because we are not using lib/unittest.bzl