Fix more links (#3598)

lychee.toml

@@ -126,6 +126,7 @@ exclude = [
   '^https://workable\.com/backend/settings/integrations',  # Redirect loop that ends up at login page
   '^https://www\.trellix\.com/products/epo/',  # timeouts
   '^https://admin\.google\.com/',  # Too many redirects
+  '^https://(docs\.)?msg91.com/',  # Throws 500 error on automated checks
   ]
 
 # Exclude these filesystem paths from getting checked.