Update snapshot.yml

Author: albertus82

.github/workflows/snapshot.yml

@@ -21,6 +21,12 @@ jobs:
         server-id: central
         server-username: MAVEN_USERNAME
         server-password: MAVEN_PASSWORD
+    - uses: actions/cache@v3
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
     - run: mvn clean deploy -B -V -e -ntp
       env:
         MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}