chore: update pin for ref

Author: mcp-registry-bot

servers/ref/server.yaml

@@ -12,7 +12,7 @@ about:
   icon: https://avatars.githubusercontent.com/u/210568548?v=4
 source:
   project: https://github.com/ref-tools/ref-tools-mcp
-  commit: 09f86e87926bd08fba44c6ea89480f3f73a7c841
+  commit: 015f94b45ee5c5e4f931c155c8d4cd3481f9e5db
 config:
   description: Configure the connection to Ref
   secrets: