Update updates.yaml

Signed-off-by: John Osborne <josborne@chainguard.dev>

.github/workflows/updates.yaml

@@ -106,7 +106,7 @@ jobs:
         env:
           GH_TOKEN: ${{ steps.octo-sts.outputs.token }}
         run: |
-          git config --global user.name "${{ env.CI_COMMIT_AUTHOR }}"
+          git config --global user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --global push.autoSetupRemote true
           cd $GITHUB_WORKSPACE