Change commit author to stackhpc-ci

Author: assumptionsandg

.github/workflows/update-dependencies.yml

@@ -78,6 +78,7 @@ jobs:
           path: ${{ github.workspace }}/src/kayobe-config
           commit-message: >-
             Bump ${{ matrix.key }} to ${{ steps.latest_tag.outputs.latest_tag }}
+          author: stackhpc-ci <22933334+stackhpc-ci@users.noreply.github.com>
           branch: update-dependency/${{ matrix.key }}/${{ inputs.openstack_version }}
           delete-branch: true
           title: >-