Add ignore rules for link check

Author: choldgraf

.github/workflows/validate.yml

@@ -90,6 +90,8 @@ jobs:
            --check-links-ignore "https://jupytercon.com" \
            --check-links-ignore "https://www.netapp.com" \
            --check-links-ignore "https://github.com/[^/]+/?$" \
+           --check-links-ignore "https://sloan.org" \
+           --check-links-ignore "https://www.bloomberg.com" \
            --check-links-ignore "https://opensource.org/licenses/BSD-3-Clause"
 
   lighthouse: