chore(deps): bump actions/cache from 1 to 2.1.7 (#1551)

Bumps [actions/cache](https://github.com/actions/cache) from 1 to 2.1.7.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v1...v2.1.7)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

.github/workflows/ci.yaml

@@ -15,7 +15,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Restore go build cache
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.7
         with:
           path: ~/.cache/go-build
           key: ${{ runner.os }}-go-build-v1-${{ hashFiles('**/go.mod') }}
@@ -71,7 +71,7 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2
       - name: Restore Go build cache
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.7
         with:
           path: ~/.cache/go-build
           key: ${{ runner.os }}-go-build-v1-${{ github.run_id }}
@@ -88,7 +88,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Restore go build cache
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.7
         with:
           path: ~/.cache/go-build
           key: ${{ runner.os }}-go-build-v2-${{ hashFiles('**/go.mod') }}