[clang-tools-extra] [cland-tidy][NFC] Fixed documentation for modernize-make-unique check (PR #158421)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor commented:

For changes in docs, we don't generally write release notes because it's an NFC change.

https://github.com/llvm/llvm-project/pull/158421