ci: disable setup-go module cache

The act_runner has no actions/cache backend, so setup-go's cache step
hangs indefinitely instead of failing.

Co-Authored-By: Claude Opus 5 <[email protected]>

.gitea/workflows/test.yml

@@ -13,6 +13,8 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.22'
+          # The runner has no actions/cache backend; leaving this on hangs the step.
+          cache: false
       - name: gofmt
         run: test -z "$(gofmt -l .)" || { gofmt -l .; exit 1; }
       - run: go vet ./...