Bump actions/setup-java from 1.4.3 to 2.1.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 1.4.3 to 2.1.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](https://github.com/actions/setup-java/compare/v1.4.3...v2.1.0)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/maven.yml

@@ -36,7 +36,7 @@ jobs:
 
     # Setup Java
     - name: Set up JDK
-      uses: actions/setup-java@v1.4.3
+      uses: actions/setup-java@v2.1.0
       with:
         # Use Java 11, because it's minimum required version
         java-version: 11