Update Bengali translation

Co-authored-by: Hosted Weblate <hosted@weblate.org>
Co-authored-by: Tauhid Alam Rifty <tauhidalamrifty@gmail.com>

locales/bn.json

@@ -90,5 +90,7 @@
     "preferences_quality_option_medium": "মধ্যম",
     "preferences_quality_option_small": "ছোট",
     "preferences_quality_dash_option_1080p": "১০৮০পি",
-    "preferences_quality_dash_option_720p": "৭২০পি"
+    "preferences_quality_dash_option_720p": "৭২০পি",
+    "Add to playlist": "প্লেলিস্টে যোগ করুন",
+    "Add to playlist: ": "প্লেলিস্টে যোগ করুন: "
 }