process-css-properties.py fails for some host locales when trying to …

…decode JSON as GBK

https://bugs.webkit.org/show_bug.cgi?id=256036

Reviewed by Darin Adler and Alexey Proskuryakov.

* Source/WebCore/css/process-css-properties.py:
Open "CSSProperties.json" as UTF-8.

Canonical link: https://commits.webkit.org/263543@main

Source/WebCore/css/process-css-properties.py

@@ -6105,7 +6105,7 @@ def main():
     parser.add_argument('--check-unused-grammars-values', action='store_true')
     args = parser.parse_args()
 
-    with open(args.properties, "r") as properties_file:
+    with open(args.properties, "r", encoding="utf-8") as properties_file:
         properties_json = json.load(properties_file)
 
     parsing_context = ParsingContext(properties_json, defines_string=args.defines, parsing_for_codegen=True, check_unused_grammars_values=args.check_unused_grammars_values, verbose=args.verbose)