fix(locales): add missing newline at end of file in English locale JSON

- Ensured proper formatting by adding a newline at the end of the en.json file to comply with JSON standards and prevent potential issues in file parsing.

src/locales/en.json

@@ -283,4 +283,4 @@
   "默认分辨率": "Default Resolution",
   "默认端口": "Default Port",
   "默认视角": "Default View"
-}
+}