Update for breaking change in actions/upload-artifact@v4

See #72 (comment)

Author: tianon

.github/workflows/ci.yml

@@ -36,6 +36,7 @@ jobs:
           path: |
             .test/.coverage/coverage.*
             .test/.coverage/GOCOVERDIR/
+          include-hidden-files: true
           if-no-files-found: error
       - name: gofmt
         run: find -name '*.go' -type f -exec ./.go-env.sh gofmt -l -s -w '{}' +