Exclude some domains from link checker

Relates to #318

Author: erget

.github/workflows/check_links.yml

@@ -20,6 +20,8 @@ jobs:
         uses: actions/checkout@v2
       - name: Check links
         uses: lycheeverse/[email protected]
+        with:
+          args: --exclude mailman.cgd.ucar.edu --exclude cfeditor.ceda.ac.uk
 
       - name: Upload report
         if: ${{ always() }}