fix: incorrect pgadmin dockerfile pw

[mistahj67]

Description

Currently the pgadmin does not properly insert the provided pw file into the pgadmin docker container so each time you reload the stack, you must manually provide the password.

Motivation and Context

I don't want to manually put the password in every time because I'm lazy.

How Has This Been Tested?

Rebuild your docker container for pgadmin
Run just bh-dev

• Chore (a change that does not modify the application functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Documentation updates are needed, and have been made accordingly.
• I have added and/or updated tests to cover my changes.
• All new and existing tests passed.
• My changes include a database migration.