Issue in /src/pages/docs/customer_account/create_customer_account.md

We need to tell what characters are allowed in the fields.

example: special chars are not allowed in name field.

Need to get the exact details from CAS team and mention in the documentation.

Start by reading /src/pages/docs/customer_account/create_customer_account.md and identify the documented customer account fields. Get the exact allowed-character rules from the CAS team, then update the page so each relevant field states its restrictions; done means the documentation reflects those confirmed details.

Written by the indexing model from the issue text.