deps: bump com.google.errorprone:error_prone_core from 2.20.0 to 2.21.1

Bumps [com.google.errorprone:error_prone_core](https://github.com/google/error-prone) from 2.20.0 to 2.21.1.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.20.0...v2.21.1)

---
updated-dependencies:
- dependency-name: com.google.errorprone:error_prone_core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -59,7 +59,7 @@
 		<maven-checkstyle-plugin.version>3.3.0</maven-checkstyle-plugin.version>
 		<checkstyle-rules.version>9.3</checkstyle-rules.version>
 		<asciidoctor-maven-plugin.version>2.0.0</asciidoctor-maven-plugin.version>
-		<errorprone.version>2.20.0</errorprone.version>
+		<errorprone.version>2.21.1</errorprone.version>
 		<native-maven-plugin.version>0.9.23</native-maven-plugin.version>
 
 		<!-- All checks except for javadoc enforced by default -->