drpc: fix shipper command YAML (colon-space in unquoted scalar broke compose)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

drpc.yml

@@ -11,7 +11,11 @@ services:
     restart: unless-stopped
     volumes:
       - ./dshackle_logs:/logs:ro
-    command: sh -c 'while true; do tail -F /logs/access_log.jsonl 2>/dev/null | nc ${SPLITS_LISTENER_HOST:-78.47.193.225} ${SPLITS_LISTENER_PORT:-9102}; echo "shipper: listener connection lost, retrying in 10s"; sleep 10; done'
+    command: >-
+      sh -c 'while true; do
+      tail -F /logs/access_log.jsonl 2>/dev/null | nc ${SPLITS_LISTENER_HOST:-78.47.193.225} ${SPLITS_LISTENER_PORT:-9102};
+      echo shipper lost listener connection, retrying in 10s;
+      sleep 10; done'
 
   dshackle:
     image: drpcorg/dshackle:0.79.10