Update cache version

Author: isudana

.github/workflows/build_cron.yml

@@ -20,7 +20,7 @@ jobs:
           java-version: 8
 
       - name: Cache maven artifacts
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}