Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/test.yaml

@@ -17,7 +17,7 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/go-build