Use BreezyCore::slug() instead of hardcoded my-profile

[phh]

Since myProfile slug can be modified, it makes sence to use that for the route when using the MustTwoFactor middleware.

Example:

BreezyCore::make()->myProfile(slug: 'profile')->enableTwoFactorAuthentication(force: true),

Before:
Route [filament.admin.pages.my-profile] not defined.

After:
Redirected to admin/profile as expected.