chore: update pin for bitrefill

Author: mcp-registry-bot

servers/bitrefill/server.yaml

@@ -12,7 +12,7 @@ about:
 source:
   project: https://github.com/bitrefill/bitrefill-mcp-server
   branch: master
-  commit: c7e486505ee35756f667193d2cea540d9d53bedb
+  commit: 3bc6123a829f1dae2f62bbf76dd2ee68a5546a50
 config:
   description: Configure the connection to Bitrefill
   secrets: