deps: update dependency gradle to v7.6.4 (#2474)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [gradle](https://gradle.org)
([source](https://togithub.com/gradle/gradle)) | patch | `7.6.3` ->
`7.6.4` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>gradle/gradle (gradle)</summary>

### [`v7.6.4`](https://togithub.com/gradle/gradle/releases/tag/v7.6.4):
7.6.4

[Compare
Source](https://togithub.com/gradle/gradle/compare/v7.6.3...v7.6.4)

This is a patch release for 7.6. We recommend using 7.6.4 instead of
7.6.

[Read the Release
Notes](https://docs.gradle.org/7.6.4/release-notes.html)

#### Upgrade instructions

Switch your build to use Gradle 7.6.4 by updating your wrapper:

    ./gradlew wrapper --gradle-version=7.6.4

See the Gradle [7.x upgrade
guide](https://docs.gradle.org/7.6.4/userguide/upgrading_version\_7.html)
to learn about deprecations, breaking changes and other considerations
when upgrading.

For Java, Groovy, Kotlin and Android compatibility, see the [full
compatibility
notes](https://docs.gradle.org/7.6.4/userguide/compatibility.html).

#### Reporting problems

If you find a problem with this release, please file a bug on [GitHub
Issues](https://togithub.com/gradle/gradle/issues) adhering to our issue
guidelines.
If you're not sure you're encountering a bug, please use the
[forum](https://discuss.gradle.org/c/help-discuss).

We hope you will build happiness with Gradle, and we look forward to
your feedback via [Twitter](https://twitter.com/gradle) or on
[GitHub](https://togithub.com/gradle).

</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 this update
again.

---

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

---

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Co-authored-by: Min Zhu <zhumin@google.com>

rules_java_gapic/resources/gradle/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists