fix: update email regex on profile edit to support TLDs of any length

frontend/lib/more/edit_profile.dart

@@ -38,7 +38,7 @@ class _EditProfilePageState extends State<EditProfilePage> {
 
  bool _isValidEmail(String email) {
  final RegExp emailRegex = RegExp(
- r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$',
+ r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,}$',
  caseSensitive: false,
  );
  return emailRegex.hasMatch(email);