update README.md

Author: shenxianpeng

README.md

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 Using `clang-format` and `clang-tidy` hooks with [pre-commit](https://pre-commit.com/) to lint your C/C++ code.
 
-Highlight✨: automatically install `clang-format` and `clang-tidy` when they do not exist.
+Highlight✨: No need to manually download and install `clang-format` or `clang-tidy` on your system.
 
 ## Usage