Update README.md to add CodeQL badge

Author: shenxianpeng

Diff for: README.md

@@ -3,6 +3,7 @@
 [![PyPI](https://img.shields.io/pypi/v/cpp-linter-hooks)](https://pypi.org/project/cpp-linter-hooks/)
 [![codecov](https://codecov.io/gh/cpp-linter/cpp-linter-hooks/branch/main/graph/badge.svg?token=L74Z3HZ4Y5)](https://codecov.io/gh/cpp-linter/cpp-linter-hooks)
 [![Test](https://github.com/cpp-linter/cpp-linter-hooks/actions/workflows/test.yml/badge.svg)](https://github.com/cpp-linter/cpp-linter-hooks/actions/workflows/test.yml)
+[![CodeQL](https://github.com/cpp-linter/cpp-linter-hooks/actions/workflows/codeql.yml/badge.svg)](https://github.com/cpp-linter/cpp-linter-hooks/actions/workflows/codeql.yml)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://github.com/pre-commit/pre-commit)
 <!-- [![PyPI - Downloads](https://img.shields.io/pypi/dw/cpp-linter-hooks)](https://pypi.org/project/cpp-linter-hooks/) -->