Incorporate David's feedback

Author: JDevlieghere

llvm/docs/ReleaseNotes.md

@@ -355,7 +355,7 @@ Changes to LLDB
 
 * A new setting `target.launch-working-dir` can be used to set a persistent cwd that is used by default by `process launch` and `run`.
 
-* LLDB now parses shared libraries in parallel, resulting in an average 2x speedup when attaching (on darwin) and launching (on all platforms).
+* LLDB now parses shared libraries in parallel, resulting in an average 2x speedup when attaching (only available on Darwin platforms) and launching (available on all platforms).
 
 Changes to BOLT
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