build(deps): bump actions/cache from v2 to v2.1.4 (#1721)

Author: dependabot[bot]

.github/workflows/pr.yml

@@ -71,7 +71,7 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.golang }}
-      - uses: actions/cache@v2
+      - uses: actions/cache@v2.1.4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ matrix.golang }}-${{ hashFiles('**/go.sum') }}