chore(deps): bump actions/cache from 2.1.5 to 2.1.6

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.5...v2.1.6)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/pull_request.yml

@@ -20,7 +20,7 @@ jobs:
       id: yarn-cache-dir-path
       run: echo "::set-output name=dir::$(yarn cache dir)"
 
-    - uses: actions/cache@v2.1.5
+    - 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 }}

.github/workflows/workflow.yml

@@ -36,7 +36,7 @@ jobs:
         run: echo "::set-output name=dir::$(yarn cache dir)"
 
       - if: ${{ steps.release.outputs.release_created }}
-        uses: actions/cache@v2.1.5
+        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 }}