Update publish.yml

Author: ankurdotb

.github/workflows/publish.yml

@@ -19,5 +19,5 @@ jobs:
       - uses: w3c/spec-prod@v1
         with:
           GH_PAGES_BRANCH: gh-pages
-          VALIDATE_LINKS: false
+          VALIDATE_LINKS: true
           VALIDATE_MARKUP: false