chore(i18n): Translated using Weblate (Chinese (Simplified Han script))

Currently translated at 100.0% (413 of 413 strings)

Translation: th-ch/youtube-music/i18n
Translate-URL: https://hosted.weblate.org/projects/youtube-music/i18n/zh_Hans/

src/i18n/resources/zh-CN.json

@@ -600,6 +600,10 @@
       },
       "name": "通知"
     },
+    "performance-improvement": {
+      "description": "通过开启危险脚本改进性能",
+      "name": "性能改进 [公测]"
+    },
     "picture-in-picture": {
       "description": "允许应用切换到画中画模式",
       "menu": {