Issue with bob password AllowedPattern

[ghostcodekc]

Is there any reason why the following was chosen in the file aws-sa-pro/03-AdvancedPermissionsAndAccounts/04_Cross-AccountPermissions/01_DEMOSETUP/bob.yaml :

AllowedPattern: ^[a-zA-Z0-9]*$

I came across an issue when using a randomly generated password that included a special character "@" or "!" as it did not conform to the password pattern.

[acantril]

it's a standard thats part of a lot of AWS templates ... lowest common denominator