Update css_check.py coderabbit suggestions

Author: IITI-tushar

.github/workflows/css_check.py

@@ -74,7 +74,8 @@ def check_files(
                 css_imports = re.findall(r'import\s+.*?["\'](.+?\.css)["\']', content)
                 for css_file in css_imports:
                     # Try to find the CSS file
-                    css_file_path = os.path.join(os.path.dirname(file_path), css_file)
+                    base_path = os.path.dirname(file_path)
+                    css_file_path = os.path.normpath(os.path.join(base_path, css_file))
                     if not os.path.exists(css_file_path):
                         # If not found, try to find it relative to the src directory
                         src_dir = os.path.abspath(directory)