Bump org.apache.maven:maven-core

Bumps [org.apache.maven:maven-core](https://github.com/apache/maven) from 3.6.2 to 3.8.1.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.2...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>

tools/jersey-release-notes-maven-plugin/pom.xml

@@ -127,6 +127,6 @@
 
     <properties>
         <java.version>1.8</java.version>
-        <maven.version>3.6.2</maven.version>
+        <maven.version>3.8.1</maven.version>
     </properties>
 </project>