Use a separate cache for the job that builds static kittens

.github/workflows/ci.yml

@@ -88,6 +88,17 @@ jobs:
             uses: actions/setup-go@v4
             with:
               go-version-file: go.mod
+              cache: false
+
+          - name: Cache Go build artifacts separately
+            uses: actions/cache@v3
+            with:
+              path: |
+                ~/.cache/go-build
+                ~/go/pkg/mod
+              key: ${{ runner.os }}-golang-static-${{ hashFiles('**/go.sum') }}
+              restore-keys: |
+                ${{ runner.os }}-golang-static-
 
           - name: Install build-only deps
             run: python -m pip install -r docs/requirements.txt ruff mypy types-requests types-docutils