fix release log linting

Author: goums

doc/release-notes.md

@@ -51,8 +51,7 @@ Core should also work on most other Unix-like systems but is not as
 frequently tested on them.  It is not recommended to use Bitcoin Core on
 unsupported systems.
 
-From Bitcoin Core 0.22.0 onwards, macOS versions earlier than 10.14 are no
-longer supported. 
+From Bitcoin Core 0.22.0 onwards, macOS versions earlier than 10.14 are no longer supported.
 
 Notable changes
 ===============