ci: give token

Author: cpcloud

.github/workflows/ci.yml

@@ -39,6 +39,8 @@ jobs:
     steps:
       - name: Compute whether to skip builds and tests
         id: get-should-skip
+        env:
+          GH_TOKEN: ${{ github.token }}
         run: |
           set -euxo pipefail
           if ${{ startsWith(github.ref_name, 'pull-request/') }}; then