Try using spec-prod rather than the remote bikeshed server

Author: andreubotella

.github/workflows/deploy.yml

@@ -14,9 +14,11 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Build spec
-        run: |
-          mkdir -p out
-          curl --retry 2 --fail https://api.csswg.org/bikeshed/ --output out/index.html --header "Accept: text/plain, text/html" -F die-on=fatal -F file=@"index.bs"
+        uses: w3c/spec-prod@v2
+        with:
+          TOOLCHAIN: bikeshed
+          DESTINATION: out/index.html
+
       - name: Upload to Deno Deploy
         uses: denoland/deployctl@v1
         with: