go.mod: bump btclog v2 version

docs/release-notes/release-notes-0.20.0.md

@@ -36,6 +36,10 @@
 - Fixed a [deadlock](https://github.com/lightningnetwork/lnd/pull/10108) that
   can cause contract resolvers to be stuck at marking the channel force close as
   being complete.
+ 
+- [Fix](https://github.com/lightningnetwork/lnd/pull/10107) a bug where child 
+  logger's derived via `WithPrefix` did not inherit change log level changes 
+  from their parent loggers. 
 
 # New Features