chore(deps): update actions/cache action to v6

Author: renovate[bot]

.github/workflows/monorepo-pipeline.yml

@@ -25,7 +25,7 @@ jobs:
       run: echo "::set-output name=dir::$(yarn cache dir)"
 
     - name: Use Yarn cache
-      uses: actions/cache@v2
+      uses: actions/cache@v6
       id: yarn-cache
       with:
         path: ${{ steps.yarn-cache-dir-path.outputs.dir }}