Don't error out on broken links, for now

Author: EliahKagan

.github/workflows/markdown.yml

@@ -15,6 +15,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Check Markdown links
         uses: gaurav-nelson/[email protected]
+    continue-on-error: true
 
   markdownlint-cli2:
     name: Lint