fix: always show a newly created workspace at the top of the list (#6984)

Fixes #5795.

coderd/database/queries/workspaces.sql

@@ -270,10 +270,11 @@ INSERT INTO
 		template_id,
 		name,
 		autostart_schedule,
-		ttl
+		ttl,
+		last_used_at
 	)
 VALUES
-	($1, $2, $3, $4, $5, $6, $7, $8, $9) RETURNING *;
+	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) RETURNING *;
 
 -- name: UpdateWorkspaceDeletedByID :exec
 UPDATE