Add new validations to lint-checker

Author: kelvins

.github/workflows/lint-checker.yml

@@ -18,11 +18,14 @@ jobs:
           VALIDATE_GO: true
           VALIDATE_RUBY: true
           VALIDATE_KOTLIN: true
+          VALIDATE_MARKDOWN: true
           VALIDATE_SCALAFMT: true
           VALIDATE_RUST_2021: true
           VALIDATE_RUST_CLIPPY: true
+          VALIDATE_PYTHON_RUFF: true
           VALIDATE_PYTHON_BLACK: true
           VALIDATE_PYTHON_ISORT: true
           VALIDATE_CLANG_FORMAT: true
           VALIDATE_JAVASCRIPT_ES: true
+          VALIDATE_MARKDOWN_PRETTIER: true
           VALIDATE_GOOGLE_JAVA_FORMAT: true