Bump com.google.protobuf:protobuf-java from 4.30.2 to 4.31.0

Bumps [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) from 4.30.2 to 4.31.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v4.30.2...v4.31.0)

---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-java
  dependency-version: 4.31.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ maven-publish = "0.31.0"
 # - conformance/buf.gen.yaml
 # - src/test/resources/proto/buf.gen.imports.yaml
 # - src/test/resources/proto/buf.gen.noimports.yaml
-protobuf = "4.30.2"
+protobuf = "4.31.0"
 
 [libraries]
 assertj = { module = "org.assertj:assertj-core", version.ref = "assertj" }