Bump actions/cache from 2.1.7 to 4.0.2

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.7 to 4.0.2.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2.1.7...v4.0.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/go.yml

@@ -37,7 +37,7 @@ jobs:
         go-version: 1.15.x
 
     - name: Cache
-      uses: actions/cache@v2.1.7
+      uses: actions/cache@v4.0.2
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -71,7 +71,7 @@ jobs:
         go-version: ${{ matrix.go-version }}
 
     - name: Cache
-      uses: actions/cache@v2.1.7
+      uses: actions/cache@v4.0.2
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}