UX Enhancement: Add autofocus to password_input fields

At present we do not have the `autofocus` attribute in our password prompt:
https://github.com/dwyl/auth/blob/946f6ba58844798b32b2a81f5b1a246a3b396549/lib/auth_web/templates/auth/password_prompt.html.eex#L6-L7
Or password create:
https://github.com/dwyl/auth/blob/946f6ba58844798b32b2a81f5b1a246a3b396549/lib/auth_web/templates/auth/password_create.html.eex#L6-L8

Having recently discovered how to do it: https://github.com/dwyl/learn-phoenix-framework/issues/138
I feel this is a worthwhile enhancement that can be added to speed up the UX on both password creation and password prompt forms.

# Todo

+ [ ] add `autofocus: "true"` to the `password_input` in `lib/auth_web/templates/auth/password_prompt.html.eex#L6-L7`
+ [ ] add `autofocus: "true"` to the `password_input` in `/lib/auth_web/templates/auth/password_create.html.eex#L6-L8`
+ [ ] Create Pull Request referencing this issue.

This is a perfect "first contribution" for someone new to the team/project.

Open lib/auth_web/templates/auth/password_prompt.html.eex and lib/auth_web/templates/auth/password_create.html.eex at the password_input lines identified in the issue. Check how those fields are rendered, then add the requested autofocus attribute to both forms. Done means both password fields include autofocus and the change is submitted in a pull request referencing issue #80.

Written by the indexing model from the issue text.