build(ci): make linkinator advisory (#30257)

.github/workflows/superset-docs-verify.yml

@@ -16,6 +16,7 @@ jobs:
     # See docs here: https://github.com/marketplace/actions/linkinator
     name: Link Checking
     runs-on: ubuntu-latest
+    continue-on-error: true # This will make the job advisory (non-blocking, no red X)
     steps:
       - uses: actions/checkout@v4
       - uses: JustinBeckwith/linkinator-action@v1.10.4