Interrapt G26

Description: According to specification, when creating new Mentor, the maximum number of characters is 25, but new Mentor can be created with surname length above the maximum
Steps to reproduce :
1. Navigate to https://qainterrapt.brainster.xyz/mentors/create
2.Fill in all the required fields
3. Write the surname with more than 25 characters
4.Click on create and observe the following action
Expected result: When creating a new Мentor, if the length of the surname is over 25 characters, "Surname field is required" message should appear
Actual result: When in Surname field are written more than 25 characters, along with other required fields, and clicking crate, "New Mentor is created successfully" message is shown