Merge pull request #928 from nate-double-u/update-cncf-artwork-access

udpating user access for cncf/artwork

Author: huats

config.yaml

@@ -24,7 +24,7 @@ repositories:
     teams:
       landscapers: write
     external_collaborators:
-      alexcontini: write
+      alexcontini: maintain
       thetwopct: write
       nate-double-u: admin
   - name: automation