Bump com.google.errorprone:error_prone_core from 2.30.0 to 2.31.0

Bumps [com.google.errorprone:error_prone_core](https://github.com/google/error-prone) from 2.30.0 to 2.31.0.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.30.0...v2.31.0)

---
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] <support@github.com>

pom.xml

@@ -322,7 +322,7 @@
                         <path>
                             <groupId>com.google.errorprone</groupId>
                             <artifactId>error_prone_core</artifactId>
-                            <version>2.30.0</version>
+                            <version>2.31.0</version>
                         </path>
                         <path>
                             <groupId>com.uber.nullaway</groupId>