Update Chinese (Traditional) translation

Co-authored-by: Hosted Weblate <hosted@weblate.org>
Co-authored-by: Jeff Huang <s8321414@gmail.com>

locales/zh-TW.json

@@ -433,5 +433,5 @@
     "adminprefs_modified_source_code_url_label": "修改後的原始碼倉庫 URL",
     "footer_donate_page": "捐款",
     "preferences_region_label": "內容國家： ",
-    "preferences_quality_dash_label": "偏好的 dash 影片品質： "
+    "preferences_quality_dash_label": "偏好的 DASH 影片品質： "
 }