iUpdate github CI action v2 to v3 on ubuntu

Author: zhezhouzz

.github/workflows/ubuntuci.yml

@@ -16,7 +16,7 @@ jobs:
       with:
         java-version: 11
     - name: Cache Maven packages
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/.m2
         key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}