build(deps): bump error_prone_annotations from 2.15.0 to 2.16

Bumps [error_prone_annotations](https://github.com/google/error-prone) from 2.15.0 to 2.16.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.15.0...v2.16)

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

Signed-off-by: dependabot[bot] <support@github.com>

spotbugs-tests/build.gradle

@@ -20,7 +20,7 @@ dependencies {
   implementation 'org.apache.ant:ant:1.10.12'
   implementation "org.apache.logging.log4j:log4j-core:$log4jVersion"
   implementation "org.apache.logging.log4j:log4j-slf4j2-impl:$log4jVersion"
-  implementation 'com.google.errorprone:error_prone_annotations:2.15.0'
+  implementation 'com.google.errorprone:error_prone_annotations:2.16'
   implementation files(project(":spotbugs").sourceSets.gui.output)
 }