Bump actions/cache from v2 to v2.1.4 (#99495)

Bumps [actions/cache](https://github.com/actions/cache) from v2 to v2.1.4.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2...26968a09c0ea4f3e233fdddbafd1166051a095f6)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/bump-unversioned-casks.yml

@@ -52,7 +52,7 @@ jobs:
           mkdir "${GITHUB_WORKSPACE}"
 
       - name: Cache Homebrew Gems
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: ${{ steps.set-up-homebrew.outputs.gems-path }}
           key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
@@ -67,7 +67,7 @@ jobs:
           echo "::set-output name=time::$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
 
       - name: Cache state
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: ~/bump-unversioned-casks-state.json
           key: bump-unversioned-casks-${{ steps.cache-id.outputs.time }}

.github/workflows/cache.yml

@@ -41,7 +41,7 @@ jobs:
 
       - name: Cache Homebrew Gems
         id: cache
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: ${{ steps.set-up-homebrew.outputs.gems-path }}
           key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}

.github/workflows/ci.yml

@@ -93,7 +93,7 @@ jobs:
           mkdir "${GITHUB_WORKSPACE}"
 
       - name: Cache Homebrew Gems
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: ${{ steps.set-up-homebrew.outputs.gems-path }}
           key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}