Add wikimedia.cloud domain

WMCS are moving from using wmflabs to wikimedia.cloud:
https://wikitech.wikimedia.org/wiki/Wikimedia_Cloud_Services_team/EnhancementProposals/DNS_domain_setup

They're in the process of switching over: T259256

Change-Id: Ifffa0fce90eefb0ca901432f5b33cad200362bfb
diff --git a/configs/ssh-client-config b/configs/ssh-client-config
index 6302ead..b385b0d 100644
--- a/configs/ssh-client-config
+++ b/configs/ssh-client-config
@@ -73,7 +73,7 @@
     UserKnownHostsFile ~/.ssh/known_hosts.d/wmf-cloud
 
 # See https://wikitech.wikimedia.org/wiki/Managing_multiple_SSH_agents#Using_multiple_agents_via_systemd for setting up multiple agents using systemd
-Host *.wmflabs.org *.wmflabs
+Host *.wmflabs.org *.wmflabs *.wikimedia.cloud
     User USERNAME
     IdentityFile ~/.ssh/WMCS_KEY
     IdentityAgent /run/user/1000/ssh-wmf-cloud.socket