Bump com.github.spotbugs:spotbugs from 4.8.3 to 4.8.4

Bumps [com.github.spotbugs:spotbugs](https://github.com/spotbugs/spotbugs) from 4.8.3 to 4.8.4.
- [Release notes](https://github.com/spotbugs/spotbugs/releases)
- [Changelog](https://github.com/spotbugs/spotbugs/blob/master/CHANGELOG.md)
- [Commits](spotbugs/spotbugs@4.8.3...4.8.4)

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

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

pom.xml

@@ -208,7 +208,7 @@
     <commons.site-plugin.version>3.12.1</commons.site-plugin.version>
     <commons.spotbugs.plugin.version>4.8.4.0</commons.spotbugs.plugin.version>
     <!-- Wait for Spotbugs 4.8.5 to fix https://github.com/spotbugs/spotbugs/issues/2967 --> 
-    <commons.spotbugs.impl.version>4.8.3</commons.spotbugs.impl.version>
+    <commons.spotbugs.impl.version>4.8.4</commons.spotbugs.impl.version>
     <commons.surefire-report.version>3.2.5</commons.surefire-report.version>
     <commons.surefire.version>3.2.5</commons.surefire.version>
     <commons.wagon-ssh.version>3.5.3</commons.wagon-ssh.version>