[clang-tools-extra] [clang-tidy] Rename google-build-namespaces to misc-anonymous-namespace-in-header (PR #173484)

[via cfe-commits]

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zeyi2 wrote:

Please also update the documentation of `cert-dcl59-cpp` and `fuchsia-header-anon-namespaces`.

https://github.com/llvm/llvm-project/pull/173484