Update flutter_custom_tabs_web/pubspec.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: droibit

flutter_custom_tabs_web/pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_web_plugins:
-    sdk: flutter 
+    sdk: flutter
   # flutter_custom_tabs_platform_interface: ^2.3.0
   flutter_custom_tabs_platform_interface:
     path: ../flutter_custom_tabs_platform_interface