chore(deps): update actions/cache action to v2.1.6

Author: renovate-bot

.github/workflows/nodejs.yml

@@ -31,7 +31,7 @@ jobs:
 
 # Cache Optimization 
 
-      - uses: actions/cache@v2.1.4
+      - uses: actions/cache@v2.1.6
         id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}