chore(deps): update actions/cache action to v4 (#68)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -38,7 +38,7 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
       - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           # In order:
           # * Module download cache