Dispatch release notes with a gh token

Author: grahamc

.github/workflows/propose-release.yml

@@ -26,6 +26,6 @@ jobs:
       extra-commands-early: |
         echo ${{ inputs.version }} > .version-determinate
         git add .version-determinate
-        ./.github/release-notes.sh
+        GH_TOKEN="${{ github.token }}" ./.github/release-notes.sh
         git add doc
         git commit -m "Set .version-determinate to ${{ inputs.version }}" || true