build(deps): bump actions/cache from v2.1.4 to v2.1.5

Bumps [actions/cache](https://github.com/actions/cache) from v2.1.4 to v2.1.5.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.4...1a9e213)

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

.github/workflows/github-actions.yml

@@ -35,7 +35,7 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Cache dependencies
-      uses: actions/cache@v2.1.4
+      uses: actions/cache@v2.1.5
       with:
         # Cache
         path: ~/go/pkg/mod