Update hcx-onboard-docker-build.yml

Author: jagadishkesav

.github/workflows/hcx-onboard-docker-build.yml

@@ -32,7 +32,7 @@ jobs:
           java-version: 17
 
       - name: Cache Maven dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-hcx-onboard