Bump spotbugs-annotations from 4.6.0 to 4.7.0

Bumps [spotbugs-annotations](https://github.com/spotbugs/spotbugs) from 4.6.0 to 4.7.0.
- [Release notes](https://github.com/spotbugs/spotbugs/releases)
- [Changelog](https://github.com/spotbugs/spotbugs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spotbugs/spotbugs/compare/4.6.0...4.7.0)

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

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

build.gradle

@@ -28,7 +28,7 @@ allprojects {
 
     ext {
         nanojsonVersion = "1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751"
-        spotbugsVersion = "4.6.0"
+        spotbugsVersion = "4.7.0"
         junitVersion = "5.8.2"
         checkstyleVersion = "9.3" // do not use latest version (10.0) as it requires compile JDK 11
     }