build(deps): bump com.github.spotbugs:spotbugs-maven-plugin (#574)

Bumps [com.github.spotbugs:spotbugs-maven-plugin](https://github.com/spotbugs/spotbugs-maven-plugin) from 4.8.6.2 to 4.8.6.4.
- [Release notes](https://github.com/spotbugs/spotbugs-maven-plugin/releases)
- [Commits](spotbugs/spotbugs-maven-plugin@spotbugs-maven-plugin-4.8.6.2...spotbugs-maven-plugin-4.8.6.4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

modules/SilkSpawners/pom.xml

@@ -316,7 +316,7 @@
       <plugin>
         <groupId>com.github.spotbugs</groupId>
         <artifactId>spotbugs-maven-plugin</artifactId>
-        <version>4.8.6.2</version>
+        <version>4.8.6.4</version>
         <configuration>
           <effort>Max</effort>
           <threshold>Low</threshold>

pom.xml

@@ -106,7 +106,7 @@
       <plugin>
         <groupId>com.github.spotbugs</groupId>
         <artifactId>spotbugs-maven-plugin</artifactId>
-        <version>4.8.6.2</version>
+        <version>4.8.6.4</version>
         <configuration>
           <effort>Max</effort>
           <threshold>Low</threshold>