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/release.yml

@@ -33,7 +33,7 @@ jobs:
       # Caching for speedup
       #
       - name: Gradle Cache
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: |
             ~/.gradle/caches

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
       # Caching for speedup
       #
       - name: Gradle Cache
-        uses: actions/cache@v2
+        uses: actions/cache@v2.1.4
         with:
           path: |
             ~/.gradle/caches