Add English translation for filtering end-of-poll notifications

Ref: poll-notif

src/i18n/en.json

@@ -428,6 +428,7 @@
     "notification_visibility_repeats": "Repeats",
     "notification_visibility_moves": "User Migrates",
     "notification_visibility_emoji_reactions": "Reactions",
+    "notification_visibility_polls": "Ends of polls you voted in",
     "no_rich_text_description": "Strip rich text formatting from all posts",
     "no_blocks": "No blocks",
     "no_mutes": "No mutes",