compose-cli: fix PAT detection for PAT suggestion

[landism]

What I did

Problem

When logging in with a PAT, docker login tells me... I should be using a PAT:

docker login
Authenticating with existing credentials...
Login Succeeded

Logging in with your password grants your terminal complete access to your account.
For better security, log in with a limited-privilege personal access token. Learn more at https://docs.docker.com/go/access-tokens/

compose-cli is looking for the prefix dckrp_ but hub currently issues pats with the prefix dckr_pat_.

Solution

Also check for the prefix dckr_pat_. (maybe we could just exclusively check for this prefix? I have not looked into the history of dckrp_)

Related issue

(not mandatory) A picture of a cute animal, if possible in relation with what you did

[landism]

@milas apparently I don't have access to add reviewers in this repo