Merge pull request #777 from graphql-java-kickstart/renovate/actions-cache-4.x

Update actions/cache action to v4

Author: oryan-block

.github/workflows/pull-request.yml

@@ -17,7 +17,7 @@ jobs:
           java-version: ${{ matrix.java }}
           distribution: 'adopt'
       - name: Cache Maven packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}