Bump protobuf-java from 3.21.3 to 3.21.4
Bump protobuf-java from 3.21.3 to 3.21.4

Bumps [protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.21.3 to 3.21.4.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/c9869dc7803eb0a21d7e589c40ff4f9288cd34ae"><code>c9869dc</code></a> Updating version.json and repo version numbers to: 21.4</li>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/c2548258b9e0a6713ae368888628137b1ac50735"><code>c254825</code></a> Reduce the required alignment of ArenaString from 8 to 4 (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10298">#10298</a>)</li>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/ddb21b2dffd8f864b517290ad8d1411cd4e68b61"><code>ddb21b2</code></a> Update version.json to: 21.4-dev (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10299">#10299</a>)</li>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/4e7c56cf43634886e3ed7beea8dd0041dabc23db"><code>4e7c56c</code></a> Update developer username in package.xml (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10297">#10297</a>)</li>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/e7835368be17c82689020b6af6d84088c3b19d4e"><code>e783536</code></a> Update the release date in package.xml (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10295">#10295</a>)</li>
<li><a href="https://github.com/protocolbuffers/protobuf/commit/4d2d935f6cd41d3d3cfcab600feb6abfc3a05feb"><code>4d2d935</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10289">#10289</a> from protocolbuffers/21.x-202207202258</li>
<li>See full diff in <a href="https://github.com/protocolbuffers/protobuf/compare/v3.21.3...v3.21.4">compare view</a></li>
</ul>
</details>
<br />

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Fixes #1006

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/truth/pull/1006 from google:dependabot/maven/com.google.protobuf-protobuf-java-3.21.4 34e7c77728bfee592dfe15918f03ee94df9f07ca
PiperOrigin-RevId: 463839967

google/truth,google/truth,google/truth