[clang-tools-extra] [clang-tidy] add misc-constexpr check (PR #146553)

[Baranov Victor via cfe-commits]

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@@ -270,6 +270,10 @@ Changes in existing checks
   excluding variables with ``thread_local`` storage class specifier from being
   matched.
 
+- Added :doc:`modernize-use-constexpr
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vbvictor wrote:

Also, synced with first sentence in docs.

https://github.com/llvm/llvm-project/pull/146553