[clang-tools-extra] [clang-tidy] Fix `performance-unnecessary-value-param` FN when passing `std::function` rvalue into `std::map::try_emplace` (PR #180806)

[via cfe-commits]

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@@ -32,9 +32,12 @@ Example:
     ExpensiveToCopy Copy(Value);
   }
 
-If the parameter is not const, only copied or assigned once and has a
-non-trivial move-constructor or move-assignment operator respectively the check
-will suggest to move it.
+If the parameter is not ``const``, and only copied or assigned once, the check
+will suggest a move in the following scenarios:
+
+1. the parameter has a non-trivial move-constructor or move-assignment operator
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EugeneZelenko wrote:

I think will be good idea to use bulleted, not numbered list.

https://github.com/llvm/llvm-project/pull/180806