chore(deps): bump org.apache.maven.plugins:maven-gpg-plugin (#2846)

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.2.7 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.2.7...maven-gpg-plugin-3.2.8)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-gpg-plugin
  dependency-version: 3.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

operator-framework-bom/pom.xml

@@ -42,7 +42,7 @@
 
   <properties>
     <nexus-staging-maven-plugin.version>1.7.0</nexus-staging-maven-plugin.version>
-    <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
+    <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
     <maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>
     <spotless.version>2.44.3</spotless.version>

pom.xml

@@ -84,7 +84,7 @@
     <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
     <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
     <maven-clean-plugin.version>3.5.0</maven-clean-plugin.version>
-    <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
+    <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <nexus-staging-maven-plugin.version>1.7.0</nexus-staging-maven-plugin.version>
     <maven-deploy-plugin.version>3.0.0</maven-deploy-plugin.version>
     <maven-install-plugin.version>3.1.4</maven-install-plugin.version>