Update build.yaml

Author: jurgenvinju

.github/workflows/build.yaml

@@ -24,7 +24,7 @@ jobs:
           java-package: jdk
 
       - name: Cache Maven packages
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}