deps: Bump org.apache.maven:maven-plugin-api from 3.9.2 to 3.9.4 (#163)

Bumps [org.apache.maven:maven-plugin-api](https://github.com/apache/maven) from 3.9.2 to 3.9.4.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.9.2...maven-3.9.4)

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

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Author: dependabot[bot]

pom.xml

@@ -79,7 +79,7 @@
         <gpg.version>3.0.1</gpg.version>
         <release-plugin.version>3.0.0-M7</release-plugin.version>
         <shade.version>3.5.0</shade.version>
-        <plugin-api.version>3.9.2</plugin-api.version>
+        <plugin-api.version>3.9.4</plugin-api.version>
         <plugin-annotations.version>3.9.0</plugin-annotations.version>
         <maven-project.version>3.0-alpha-2</maven-project.version>
         <maven-plugin.version>3.9.0</maven-plugin.version>