Bump com.github.spotbugs:spotbugs-maven-plugin from 4.9.6.0 to 4.9.8.1

Author: dependabot[bot]

pom.xml

@@ -185,7 +185,7 @@
  <plugin>
  <groupId>com.github.spotbugs</groupId>
  <artifactId>spotbugs-maven-plugin</artifactId>
- <version>4.9.6.0</version>
+ <version>4.9.8.1</version>
  </plugin>
  <plugin>
  <groupId>org.codehaus.mojo</groupId>