(B) Fix arabic only regex

Clinics.Backend/Domain/ValidationConstants/RegularExpressions/ValidationRegularExpressions.cs

@@ -6,7 +6,7 @@ public static class ValidationRegularExpressions
         => @"^[\u0600-\u06ff\s]+$|^[a-zA-Z\s]+$";
 
     public static string ArabicLettersOnly
-        => @"^[א-׿ء-ي]+$";
+            => @"^[א-׿ء-ي\s]+$";
 
     public static string EmailAddress
         => @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$";