Update dependency org.jetbrains.dokka to v1.9.20 (#1257)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [org.jetbrains.dokka](https://togithub.com/Kotlin/dokka) | plugin |
patch | `1.9.10` -> `1.9.20` |

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---

### Release Notes

<details>
<summary>Kotlin/dokka (org.jetbrains.dokka)</summary>

### [`v1.9.20`](https://togithub.com/Kotlin/dokka/releases/tag/v1.9.20):
1.9.20

#### General bugfixes

- Fixed sealed interfaces not having the `sealed` keyword in signatures
([Kotlin/dokka#2994)
- Fixed incorrect links in multi-module projects with non-unique package
names
([Kotlin/dokka#2272).
Huge thanks to [@&#8203;EddieRingle](https://togithub.com/EddieRingle)!
- Fixed member extensions not being shown on index pages in certain
scenarios
([Kotlin/dokka#3187)
- Fixed Java's inner classes not having the `inner` keyword in Kotlin
signatures
([Kotlin/dokka#2793)
- Fixed Java's `@param` tag not working with type parameters
([Kotlin/dokka#3199)
- Fixed Dokka failing in KMP projects when the JVM source set is
suppressed
([Kotlin/dokka#3209)

#### HTML format

- Provide an ability to add a custom homepage link to the header, more
details in
[Kotlin/dokka#2948 (comment)
- Fixed tab selection resetting after navigating to a different page
([Kotlin/dokka#2899)
- Fixed inline code not always being aligned with the surrounding text
([Kotlin/dokka#3228)
- Fixed the "No options found" text in search being barely visible
([Kotlin/dokka#3281)
- Fixed empty HTML tags being rendered for no reason
([Kotlin/dokka#3343,
[Kotlin/dokka#3095)

#### Runners

##### Gradle Plugin

- Mark tasks as not compatible with Gradle configuration cache, second
try
([Kotlin/dokka#3438).
Thanks to [@&#8203;3flex](https://togithub.com/3flex) for noticing and
fixing the problem!

##### Maven Plugin

- Fixed `dokka:help` being absent
([Kotlin/dokka#3035).
Thanks to [@&#8203;aSemy](https://togithub.com/aSemy)!
- Fixed the source links configuration not working
([Kotlin/dokka#3046).
Thanks to [@&#8203;freya022](https://togithub.com/freya022) for fixing
this one!

##### CLI runner

- Allow using relative paths in the `sourceRoots` configuration option
([Kotlin/dokka#2571)

#### Plugin API

- Provide an extension point to customize the rendering of code blocks
in HTML format
([Kotlin/dokka#3244)

#### Other:

- Make sure `wasm-js` and `wasm-wasi` targets introduced in Kotlin
1.9.20 are supported
([Kotlin/dokka#3310)
- Avoid concurrent invocations of Kotlin compiler's API due to the
compiler API itself not always being thread safe
([Kotlin/dokka#3151).
No noticeable performance loss is expected.
- Bump dependencies to the latest versions
([Kotlin/dokka#3231,
[Kotlin/dokka#3206,
[Kotlin/dokka#3204)
- Fix a documentation link
([Kotlin/dokka#3213).
Thanks to [@&#8203;SubhrajyotiSen](https://togithub.com/SubhrajyotiSen)
for noticing and fixing it!
- Various build and project structure improvements
([Kotlin/dokka#3174,
[Kotlin/dokka#3132).
Enormous thanks to [@&#8203;aSemy](https://togithub.com/aSemy) for the
help!

See [Dokka
1.9.20](https://togithub.com/Kotlin/dokka/milestone/30?closed=1)
milestone for the list of all changes.

</details>

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gradle/libs.versions.toml

@@ -28,7 +28,7 @@ compose-integration-constraintlayout = "1.0.1"
 dagger = "2.51"
 datastore = "1.1.0-beta01"
 detekt = "1.23.5"
-dokka = "1.9.10"
+dokka = "1.9.20"
 eithernet = "1.8.1"
 jdk = "21"
 jvmTarget = "11"