Fix maru version: v1.2.0 -> v1.2.1-20260410142843-d326b73

v1.2.0 tag doesn't exist on Docker Hub, causing compose build
failures on de-27, de-32, us-40. Using the actual tag format.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

op/reth/xlayer-testnet-op-reth-archive-trace.yml

@@ -178,7 +178,7 @@ x-upstreams:
           frameSize: 20Mb
           msgSize: 50Mb
           url: $${WS_URL}
-    chain: ronin
+    chain:
     method-groups:
       enabled:
         - debug