Bump spotbugs-gradle-plugin from 4.7.2 to 4.7.3

Bumps spotbugs-gradle-plugin from 4.7.2 to 4.7.3.

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

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