BUG: Fix json description file line ending check

CRLF line endings were not detected, therefore they were only noticed by the linter, which did not give any useful hints about what was wrong with the json file.

Author: lassoan

scripts/check_description_files.py

@@ -105,9 +105,10 @@ def check_json_file_format(extension_name, metadata, extension_file_path):
             extension_name, check_name,
             f"Invalid JSON format: {str(e)}")
     # Force using LF-only line endings
-    with open(extension_file_path, 'r', encoding='utf-8') as f:
+    # Must open in binary mode to detect line endings
+    with open(extension_file_path, 'rb') as f:
         content = f.read()
-    if '\r\n' in content or '\r' in content:
+    if b'\r\n' in content or b'\r' in content:
         raise ExtensionCheckError(
             extension_name, check_name,
             "File contains non-LF line endings (CR or CRLF). Please convert to LF-only line endings.")