chore: Downgrade webrtc to fix iOS build

pubspec.lock

@@ -750,7 +750,7 @@ packages:
       name: flutter_webrtc
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.2"
+    version: "0.9.0"
   frontend_server_client:
     dependency: transitive
     description:

pubspec.yaml

@@ -48,7 +48,7 @@ dependencies:
   flutter_svg: ^0.22.0
   flutter_typeahead: ^4.0.0
   flutter_web_auth: ^0.4.0
-  flutter_webrtc: ^0.9.2
+  flutter_webrtc: 0.9.0 # Higher fails to build on iOS https://github.com/flutter-webrtc/flutter-webrtc/issues/1054
   future_loading_dialog: ^0.2.3
   geolocator: ^7.6.2
   handy_window: ^0.1.6