fix: add GITHUB_TOKEN

Author: meeroslav

action.yml

@@ -1,6 +1,9 @@
 name: 'Nx set SHAs'
 description: 'Derives SHAs for base and head for use in nx affected commands, optionally setting them as env variables for the current job'
 
+env:
+  GITHUB_TOKEN: ${{ github.token }}
+
 inputs:
   main-branch-name:
     description: 'The name of the main branch in your repo, used as the target of PRs. E.g. main, master etc'