update docker image name

Author: Roman

tests/e2e_tests/conftest.py

@@ -142,7 +142,7 @@ def try_start_docker():
         return False
 
     container_name = f"test_local_chain_{str(time.time()).replace('.', '_')}"
-    image_name = "ghcr.io/opentensor/subtensor-localnet:latest"
+    image_name = "ghcr.io/opentensor/subtensor-localnet:devnet-ready"
 
     # Command to start container
     cmds = [