ci: give labeler workflow write permissions

[casswedson]

Summary

None

Purpose of change

see #61981 (comment) so the labeler ain't working due to missing permissions, best case scenario we just need to add them manually to the workflow; this pr adds them that would make some sense, but I don't trust github so much, I am gonna give it an honest shot

this should be all we need https://github.com/actions/labeler#create-workflow

Describe the solution

let it read the contents of prs (it already did that) and write to prs

    permissions:
      contents: read
      pull-requests: write

Describe alternatives you've considered

Testing

this pr, maybe - github I hate that this works on my fork, just cause it's my fork

so like I need at least another person to test for real, for real

or maybe another account for testing permission stuff?

Additional context

gonna revert everything if this still ins't working, this #61946 and #61904

[casswedson]

oh well

https://github.com/CleverRaven/Cataclysm-DDA/actions/runs/3349130284/jobs/5548856805 the file there has the permissions set up
doesn't work at all, I guess I could look into updating the action's code some other time, for now let's just revert this baby