Update Romanian translation

Co-authored-by: Hosted Weblate <hosted@weblate.org>
Co-authored-by: Wiktor Muzynski <wiktormuzynski@gmail.com>

locales/ro.json

@@ -478,5 +478,6 @@
     "search_filters_type_option_all": "orice tip",
     "preferences_quality_dash_option_240p": "240p",
     "preferences_quality_dash_option_144p": "144p",
-    "Show less": "Afișați mai puțin"
+    "Show less": "Afișați mai puțin",
+    "Add to playlist": "Adaugă la playlist"
 }