Update actions/cache action to v5

Author: renovate[bot]

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/cache@v2
+      - uses: actions/cache@v5
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}