specify utf-8 encoding in schema generator

Author: softwareengineerprogrammer

src/geophires_x_schema_generator/main.py

@@ -22,13 +22,13 @@ def build(json_file_name_prefix: str, generator: GeophiresXSchemaGenerator, rst_
         request_schema_json, result_schema_json = generator.generate_json_schema()
 
         request_build_path = Path(build_dir, f'{json_file_name_prefix}request.json')
-        with open(request_build_path, 'w') as f:
+        with open(request_build_path, 'w', encoding='utf-8') as f:
             print(json.dumps(request_schema_json, indent=2), file=f)
             print(f'Wrote request JSON schema file to {request_build_path}.')
 
         if result_schema_json is not None:
             result_build_path = Path(build_dir, f'{json_file_name_prefix}result.json')
-            with open(result_build_path, 'w') as f:
+            with open(result_build_path, 'w', encoding='utf-8') as f:
                 print(json.dumps(result_schema_json, indent=2), file=f)
                 print(f'Wrote result JSON schema file to {result_build_path}.')