Bump org.apache.maven:maven-core

Bumps [org.apache.maven:maven-core](https://github.com/apache/maven) from 3.1.0 to 3.8.1.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.1.0...maven-3.8.1)

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

core-it-suite/src/test/resources/mng-5561-plugin-relocation-loses-configuration/new-plugin/pom.xml

@@ -11,7 +11,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
-    <maven-version>3.1.0</maven-version>
+    <maven-version>3.8.1</maven-version>
   </properties>
 
   <dependencies>