Update CONTRIBUTING.md

format code using tool/format.sh

Author: JackLau1222

CONTRIBUTING.md

@@ -50,8 +50,6 @@ You can contribute by:
 ## Code Style Guides
 
 - See [C++ Code clang-format](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format).
-  After clang-format installed(version 16.0.6, can be installed by: pip install clang-format==16.0.6), using command:
-    ```bash
-    clang-format -sort-includes=false -style="{BasedOnStyle: llvm, IndentWidth: 4}" -i <your file>
-    ```
+  After clang-format installed(version 16.0.6, can be installed by: pip install clang-format==16.0.6), using [tool/format.sh](tool/format.sh).
+