Use input instead of env to receive GitHub token

[Awayume]

The GitHub token is automatically applied to input as a default value.
This eliminates the need to explicitly specify a token when using action.

[Platane]

oooh that's good

I don't have time to review right now but will do this week

[benzlokzik]

wow that's so good

[Platane]

hi, sorry it took me that long to reply.

I tested on a different PR and confirm it works :D

just two things:

• I prefer to use the process.env. version in the test

• I think it's better to use the process.env version if it exists, to have backward compatibility:
  https://github.com/Platane/snk/pull/104/files#diff-4e3f58a464db9673926a95bb42e84def9a8003e7310e454edf894b3b1001cf7eR15-R16

I that's ok with you, I can merge #104 which reflects that

or yours if you want to edit

[Awayume]

Thank you for the review.
I will edit my code to reflect it.

[Platane]

thanks you @Awayume !