Bump error_prone_annotations from 2.12.0 to 2.12.1

Bumps [error_prone_annotations](https://github.com/google/error-prone) from 2.12.0 to 2.12.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/google/error-prone/releases">error_prone_annotations's releases</a>.</em></p>
<blockquote>
<h2>Error Prone 2.12.1</h2>
<ul>
<li>
<p>This release adds an infrastructure optimization to <code>AppliedFix</code> source code processing.</p>
</li>
<li>
<p><a href="https://github.com/google/error-prone/compare/v2.12.0...v2.12.1">Release Diff: v2.12.0...v2.12.1</a>.</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/google/error-prone/commit/6563215b667b96c7d43f16da34a87004eabbc1cf"><code>6563215</code></a> Make <code>AppliedFix</code> more efficient</li>
<li><a href="https://github.com/google/error-prone/commit/fe05664a53c8a3db8198a320771b6aed8152f479"><code>fe05664</code></a> Remove some more redundant null checks.</li>
<li>See full diff in <a href="https://github.com/google/error-prone/compare/v2.12.0...v2.12.1">compare view</a></li>
</ul>
</details>
<br />

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</details>

Fixes google#969

COPYBARA_INTEGRATE_REVIEW=google#969 from google:dependabot/maven/com.google.errorprone-error_prone_annotations-2.12.1 c8bd066
PiperOrigin-RevId: 439855854

pom.xml

@@ -120,7 +120,7 @@
  <dependency>
  <groupId>com.google.errorprone</groupId>
  <artifactId>error_prone_annotations</artifactId>
- <version>2.12.0</version>
+ <version>2.12.1</version>
  </dependency>
  <dependency>
  <groupId>com.google.protobuf</groupId>