chore(deps): bump maven.core.version from 3.8.6 to 3.9.1

Bumps `maven.core.version` from 3.8.6 to 3.9.1.

Updates `maven-plugin-api` from 3.8.6 to 3.9.1
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](https://github.com/apache/maven/compare/maven-3.8.6...maven-3.9.1)

Updates `maven-core` from 3.8.6 to 3.9.1
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](https://github.com/apache/maven/compare/maven-3.8.6...maven-3.9.1)

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-plugin-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>

integration/integration-jenkins-plugin/pom.xml

@@ -24,6 +24,9 @@
 
     <properties>
         <jenkins.version>2.397</jenkins.version>
+        <maven.deploy.skip>true</maven.deploy.skip>
+        <spotbugs.skip>true</spotbugs.skip>
+        <enforcer.skip>true</enforcer.skip>
     </properties>
 
     <dependencies>

pom.xml

@@ -112,7 +112,7 @@
         <alibaba-dingtalk-sdk.version>2.0.0</alibaba-dingtalk-sdk.version>
 
         <!-- maven plugins -->
-        <maven.core.version>3.8.6</maven.core.version>
+        <maven.core.version>3.9.1</maven.core.version>
         <maven.plugin.version>3.8.2</maven.plugin.version>
         <flatten-maven-plugin.version>1.4.1</flatten-maven-plugin.version>
         <integration-maven-plugin.version>${revision}</integration-maven-plugin.version>