chore(java): bump com.google.errorprone:error_prone_core from 2.30.0 …

…to 2.31.0 in /java (#2118)

Bumps
[com.google.errorprone:error_prone_core](https://github.com/google/error-prone)
from 2.30.0 to 2.31.0.

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

java/pom.xml

@@ -309,7 +309,7 @@
                 <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>