Bump spotbugs.version from 4.9.3 to 4.9.4

Bumps `spotbugs.version` from 4.9.3 to 4.9.4.

Updates `com.github.spotbugs:spotbugs-annotations` from 4.9.3 to 4.9.4
- [Release notes](https://github.com/spotbugs/spotbugs/releases)
- [Changelog](https://github.com/spotbugs/spotbugs/blob/master/CHANGELOG.md)
- [Commits](spotbugs/spotbugs@4.9.3...4.9.4)

Updates `com.github.spotbugs:spotbugs` from 4.9.3 to 4.9.4
- [Release notes](https://github.com/spotbugs/spotbugs/releases)
- [Changelog](https://github.com/spotbugs/spotbugs/blob/master/CHANGELOG.md)
- [Commits](spotbugs/spotbugs@4.9.3...4.9.4)

---
updated-dependencies:
- dependency-name: com.github.spotbugs:spotbugs-annotations
  dependency-version: 4.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.github.spotbugs:spotbugs
  dependency-version: 4.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -95,7 +95,7 @@
     <google-java-format.version>1.28.0</google-java-format.version>
     <jacoco.version>0.8.13</jacoco.version>
     <spotbugs-maven-plugin.version>4.9.3.2</spotbugs-maven-plugin.version>
-    <spotbugs.version>4.9.3</spotbugs.version>
+    <spotbugs.version>4.9.4</spotbugs.version>
     <!-- for documentation -->
     <broker.version>4.1</broker.version>
     <!-- to sign artifacts when releasing -->