fix make requirements.txt command

[de1987]

Description

When running the command it's saying nothing to be done because it recognizes it as a file

➜  ansible-chatbot-stack git:(main) ✗ make requirements.txt
make: Nothing to be done for 'requirements.txt'.

These changes fix the issue

Testing

Steps to test

1. Pull down the PR
2. Run the command locally

Production deployment

• This code change is ready for production on its own
• This code change requires the following considerations before going to production:

[goneri]

Hum. actually you should instead list the requirements used to build requirements.txt