Bump actions/setup-java from 2.3.0 to 2.3.1 (#97)

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v2.3.0...v2.3.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/maven.yml

@@ -45,7 +45,7 @@ jobs:
             maven-${{ matrix.os }}-
 
       - name: Set up JDK
-        uses: actions/[email protected].0
+        uses: actions/[email protected].1
         with:
           distribution: ${{ matrix.jdk }}
           java-version: ${{ matrix.java }}