docs(examples): use expression syntax to access "steps" context

examples.md

@@ -240,7 +240,7 @@ If using `npm config` to retrieve the cache directory, ensure you run [actions/s
   run: |
     echo "::set-output name=dir::$(npm config get cache)"
 - uses: actions/cache@v2
-  id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
+  id: npm-cache # use this to check for `cache-hit` ==> if: ${{ steps.npm-cache.outputs.cache-hit != 'true' }}
   with:
     path: ${{ steps.npm-cache-dir.outputs.dir }}
     key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}