[clang-tools-extra] [clang-tidy] Support C++26 placeholder bindings (PR #207604)

[via cfe-commits]

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+.. title:: clang-tidy - modernize-use-placeholder-binding
+
+modernize-use-placeholder-binding
+==================================
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EugeneZelenko wrote:

```suggestion
modernize-use-placeholder-binding
=================================
```

https://github.com/llvm/llvm-project/pull/207604