[clang-tools-extra] Fix #68492: point to the correct const location (PR #69103)

[Piotr Zegar via cfe-commits]

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@@ -297,6 +297,10 @@ Changes in existing checks
   <clang-tidy/checks/readability/braces-around-statements>` check to
   ignore false-positive for ``if constexpr`` in lambda expression.
 
+- Improved :doc:`readability-const-params-in-decls
+  <clang-tidy/checks/readability/const-params-in-decls>` place the hint check under
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PiotrZSL wrote:

Or it can be just Improved xyz diagnostics to highlight an ``const`` location.

https://github.com/llvm/llvm-project/pull/69103