chore: bytt til setup-java maven cache

Author: frode-carlsen

.github/workflows/release-kontrakt.yml

@@ -14,18 +14,7 @@ jobs:
         with:
           java-version: 11
           distribution: 'adopt'
-
-      - name: Set cache key
-        run: |
-          echo "CACHE_KEY=$(expr $(date +%V) - 1 + 1)" >> $GITHUB_ENV
-          echo "PREVIOUS_CACHE_KEY=$(expr $(date +%V) - 1 + 1)" >> $GITHUB_ENV
-      - uses: actions/cache@v2
-        with:
-          path: ~/.m2
-          key: ${{ runner.os }}-maven-${{ env.CACHE_KEY }}
-          restore-keys: |
-            ${{ runner.os }}-maven-${{ env.PREVIOUS_CACHE_KEY }}
-            
+          cache: 'maven'
       - name: Publish artifacts
         shell: bash
         run: |