revert upgrade actions/cache from v1 to v4

Signed-off-by: Adela Jaworowska-Nowak <[email protected]>

Author: adelajaworowska

.github/workflows/mysql-80.yml

@@ -35,7 +35,7 @@ jobs:
     - uses: actions/checkout@v6
     - uses: ./.github/actions/setup-java
     - name: Cache Maven packages
-      uses: actions/cache@v4
+      uses: actions/cache@v1
       with:
         path: ~/.m2
         key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}