restore ci_image

Author: BrianPei

.github/configs/metax.yml

@@ -5,7 +5,7 @@
 hardware_name: metax
 display_name: 'Metax Tests'
 
-ci_image: megatron-lm-with-te:v1
+ci_image: localhost:5000/megatron-lm-with-te:v1
 
 runner_labels:
   - self-hosted