Bump com.github.spotbugs:spotbugs-maven-plugin from 4.7.2.0 to 4.8.6.7

Bumps [com.github.spotbugs:spotbugs-maven-plugin](https://github.com/spotbugs/spotbugs-maven-plugin) from 4.7.2.0 to 4.8.6.7.
- [Release notes](https://github.com/spotbugs/spotbugs-maven-plugin/releases)
- [Commits](spotbugs/spotbugs-maven-plugin@spotbugs-maven-plugin-4.7.2.0...spotbugs-maven-plugin-4.8.6.7)

---
updated-dependencies:
- dependency-name: com.github.spotbugs:spotbugs-maven-plugin
  dependency-version: 4.8.6.7
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -92,7 +92,7 @@ The GDSC Test package contains code for use with the JUnit test framework.
     <org.jacoco.version>0.8.7</org.jacoco.version>
     <org.junit.bom.version>5.9.1</org.junit.bom.version>
     <pmd.version>7.13.0</pmd.version>
-    <spotbugs.version>4.7.2.0</spotbugs.version>
+    <spotbugs.version>4.8.6.7</spotbugs.version>
     <!-- Maven plugins -->
     <build-helper-maven-plugin.version>3.6.0</build-helper-maven-plugin.version>
     <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>