build(deps): bump actions/cache from 2.1.5 to 2.1.6 (#237)

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.5...v2.1.6)

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

@@ -34,14 +34,14 @@ jobs:
         server-id: sonatype-nexus-snapshots
         server-username: OSS_USERNAME
         server-password: OSS_PASSWORD
-    - uses: actions/[email protected].5
+    - uses: actions/[email protected].6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-maven-
     - name: Cache SonarCloud packages
-      uses: actions/[email protected].5
+      uses: actions/[email protected].6
       if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
       env:
         SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/pr.yml

@@ -27,14 +27,14 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.java_version }}
-      - uses: actions/[email protected].5
+      - uses: actions/[email protected].6
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
           restore-keys: |
             ${{ runner.os }}-maven-
       - name: Cache SonarCloud packages
-        uses: actions/[email protected].5
+        uses: actions/[email protected].6
         if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
           server-username: OSS_USERNAME
           server-password: OSS_PASSWORD
           gpg-passphrase: GPG_PASSPHRASE
-      - uses: actions/[email protected].5
+      - uses: actions/[email protected].6
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}