Grok Code Fast 1 update (#58284)

Author: sunbrye

data/tables/copilot/model-release-status.yml

@@ -94,7 +94,7 @@
 # xAI models
 - name: 'Grok Code Fast 1'
   provider: 'xAI'
-  release_status: 'Public preview'
+  release_status: 'GA'
   agent_mode: true
   ask_mode: true
   edit_mode: true