[Regression] Tokens cannot be omitted via empty strings

[Kir-Antipov]

Discussed in #103

^{Originally posted by MattiDragon January 20, 2024}
I'm using this action, wrapped in a custom workflow that does other things. I recently updated my version from v3.2 to v3.3.0 and something seems to have broken with the handling of missing tokens. One my projects isn't published on curseforge, so I don't provide a token or project it in its workflow. This used to work, but now I'm getting an error that the curseforge project doesn't exist. This shouldn't happen as no token is provided, unless mc-publish decided to pick up the unused CURSEFORGE_TOKEN actions secret without me giving it as input (the token is there because I sync my tokens to all mods that need any of them). I'm just confused as to where mc-publish is getting something it thinks is a curseforge token (it should ignore empty strings, right?)