Merge pull request #313 from cert-manager/renovate/actions-cache-4.x

chore(deps): update actions/cache action to v4

.github/workflows/on-safe-to-test-label.yml

@@ -96,12 +96,12 @@ jobs:
           echo "::set-output name=go-build::${{ env.GOCACHE }}"
           echo "::set-output name=go-mod::${{ env.GOMODCACHE }}"
       - name: Go-Build Cache # Cache go build cache, used to speedup go test
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.go-cache-paths.outputs.go-build }}
           key: ${{ runner.os }}-go-build-${{ hashFiles('**/go.sum') }}
       - name: Go-Mod Cache # Cache go mod cache, used to speedup builds
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.go-cache-paths.outputs.go-mod }}
           key: ${{ runner.os }}-go-mod-${{ hashFiles('**/go.sum') }}