build(deps): bump actions/cache from v2 to v2.1.4

Bumps [actions/cache](https://github.com/actions/cache) from v2 to v2.1.4.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2...26968a0)

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

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
               id: npm-cache-dir
               run: |
                   echo "::set-output name=dir::$(npm config get cache)"
-            - uses: actions/cache@v2
+            - uses: actions/cache@v2.1.4
               id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
               with:
                   path: ${{ steps.npm-cache-dir.outputs.dir }}
@@ -72,7 +72,7 @@ jobs:
               id: npm-cache-dir
               run: |
                   echo "::set-output name=dir::$(npm config get cache)"
-            - uses: actions/cache@v2
+            - uses: actions/cache@v2.1.4
               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 }}