Merge pull request #6124 from C-Otto/force-close-logging

contractcourt: use "info" log level for messages leading to force-closes

docs/release-notes/release-notes-0.15.0.md

@@ -48,6 +48,7 @@
 ## Documentation
 
 * Improved instructions on [how to build lnd for mobile](https://github.com/lightningnetwork/lnd/pull/6085).
+* [Log force-close related messages on "info" level](https://github.com/lightningnetwork/lnd/pull/6124).
 
 ## Code Health
 
@@ -58,6 +59,7 @@
 # Contributors (Alphabetical Order)
 
 * Andreas Schjønhaug
+* Carsten Otto
 * Daniel McNally
 * ErikEk
 * Joost Jager