Fix linode-cli account maintenance-list action

This is presently at `linode-cli maintenance maintenance-list`, which I
assume is an oversight.  This moves it to the documented command/action.

Author: Dorthu

openapi.yaml

@@ -1198,7 +1198,7 @@ paths:
         source: >
           linode-cli account login-view 1234
   /account/maintenance:
-    x-linode-cli-command: maintenance
+    x-linode-cli-command: account
     get:
       x-linode-grant: read_only
       servers: