Bump dokka-gradle-plugin from 1.5.31 to 1.6.0 (#3108)

Summary:
Bumps [dokka-gradle-plugin](https://github.com/Kotlin/dokka) from 1.5.31 to 1.6.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/Kotlin/dokka/releases">dokka-gradle-plugin's releases</a>.</em></p>
<blockquote>
<h2>1.6.0 Beta</h2>
<p>Changes:</p>
<ul>
<li><strong>New UI</strong></li>
<li>Support of version plugin for single module projects</li>
<li>Allow package-level suppression (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2209">https://github.com/facebook/flipper/issues/2209</a>), thanks <a href="https://github.com/owengray-google"><code>@​owengray-google</code></a></li>
<li>GFM: Use Markdown syntax to render lists (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2098">https://github.com/facebook/flipper/issues/2098</a>), thanks <a href="https://github.com/sgilson"><code>@​sgilson</code></a></li>
<li>Fix names of nested inheritors</li>
<li>Fix adding new custom stylesheets in submodules</li>
<li>Add keywords <code>expect</code> and <code>actual</code> in signatures</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="8d151d1b5c"><code>8d151d1</code></a> Update README, docs and examples to 1.6 (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2237">https://github.com/facebook/flipper/issues/2237</a>)</li>
<li><a href="af81f9db62"><code>af81f9d</code></a> Add space between funs descriptions (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2235">https://github.com/facebook/flipper/issues/2235</a>)</li>
<li><a href="7084461ddd"><code>7084461</code></a> Fix highlighting style (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2236">https://github.com/facebook/flipper/issues/2236</a>)</li>
<li><a href="8767bb81bf"><code>8767bb8</code></a> Bump Kotlin to 1.6.0 (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2226">https://github.com/facebook/flipper/issues/2226</a>)</li>
<li><a href="4228336d47"><code>4228336</code></a> Update version of <code>SerializationGradleIntegrationTest</code> to 1.3.1 (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2228">https://github.com/facebook/flipper/issues/2228</a>)</li>
<li><a href="b0ef738662"><code>b0ef738</code></a> Fix order of platform bubbles in header (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2225">https://github.com/facebook/flipper/issues/2225</a>)</li>
<li><a href="91b2fab43a"><code>91b2fab</code></a> Bump gradle to 7.3 (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2224">https://github.com/facebook/flipper/issues/2224</a>)</li>
<li><a href="61a5e1e1ba"><code>61a5e1e</code></a> Bump Kotlin to 1.6.0-RC2 (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2221">https://github.com/facebook/flipper/issues/2221</a>)</li>
<li><a href="0303fa827f"><code>0303fa8</code></a> Store checked exceptions into <code>ExtraProperties</code> (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2222">https://github.com/facebook/flipper/issues/2222</a>)</li>
<li><a href="4a1b8a9813"><code>4a1b8a9</code></a> Unite platforms bookmarks rows (<a href="https://github-redirect.dependabot.com/Kotlin/dokka/issues/2219">https://github.com/facebook/flipper/issues/2219</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/Kotlin/dokka/compare/v1.5.31...v1.6.0">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/3108

Reviewed By: jknoxville

Differential Revision: D32698532

Pulled By: passy

fbshipit-source-id: c98880e456de8dec2c3a3c46d8bdb10974e949a6

build.gradle

@@ -14,7 +14,7 @@ buildscript {
         classpath 'com.android.tools.build:gradle:7.0.3'
         classpath 'com.vanniktech:gradle-maven-publish-plugin:0.18.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$KOTLIN_VERSION"
-        classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.5.31"
+        classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.6.0"
     }
 }