[lldb] Add statusline to the release notes (#133281)

Add a release note for the LLDB statusline: #121860

Author: JDevlieghere

llvm/docs/ReleaseNotes.md

@@ -214,6 +214,10 @@ Changes to LLDB
   Windows 11 on the Microsoft SQ2 and Snapdragon Elite X platforms.
 * LLDB now steps through C++ thunks. This fixes an issue where previously, it
   wouldn't step into multiple inheritance virtual functions.
+* A statusline was added to command-line LLDB to show progress events and
+  information about the current state of the debugger at the bottom of the
+  terminal. This is on by default and can be configured using the
+  `show-statusline` and `statusline-format` settings.
 
 ### Changes to lldb-dap