Update build.yml

Author: albertus82

.github/workflows/build.yml

@@ -18,5 +18,10 @@ jobs:
       with:
         distribution: zulu
         java-version: 17
-        cache: 'maven'
+    - uses: actions/cache@v3
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
     - run: ./mvnw clean install -B -V -e -ntp