Reapply "Try include Release Train token to trigger AIO CI"

This reverts commit 371cbcf.

Author: assumptionsandg

.github/workflows/update-dependencies.yml

@@ -74,6 +74,7 @@ jobs:
       - name: Propose changes via PR if required
         uses: peter-evans/create-pull-request@v7
         with:
+          token: ${{ secrets.STACKHPC_RELEASE_TRAIN_TOKEN }}
           path: ${{ github.workspace }}/src/kayobe-config
           commit-message: >-
             Bump ${{ matrix.key }} to ${{ steps.latest_tag.outputs.latest_tag }}