Add missing ProfileObserver to EventProfileName view

It was noticed that occasionally the profile name at the event view
would not load to the user's display name.

The issue was fixed by adding a missing profile observer.

Issue introduced after our last public release, no need for changelog
entries.

Changelog-None
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

damus/Features/Profile/Views/EventProfileName.swift

@@ -17,6 +17,7 @@ struct EventProfileName: View {
     @State var nip05: NIP05?
     @State var donation: Int?
     @State var purple_account: DamusPurple.Account?
+    @StateObject private var profileObserver: ProfileObserver
 
     let size: EventViewKind
     
@@ -27,6 +28,7 @@ struct EventProfileName: View {
         let donation = damus.ndb.lookup_profile(pubkey)?.map({ p in p?.profile?.damus_donation }).value
         self._donation = State(wrappedValue: donation)
         self.purple_account = nil
+        self._profileObserver = StateObject.init(wrappedValue: ProfileObserver(pubkey: pubkey, damusState: damus))
     }
     
     var friend_type: FriendType? {