fix(ci): use tekton-robot identity for automated commits

The CHATOPS_TOKEN belongs to tekton-robot, so use the matching
git identity for commits created by the dependabot-regen workflow.

Signed-off-by: Abdeljaouad Khelil <akhelil@redhat.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: jkhelil

.github/workflows/dependabot-regen.yml

@@ -54,9 +54,8 @@ jobs:
           REPOSITORY: ${{ github.repository }}
           RUN_ID: ${{ github.run_id }}
         run: |
-          # Configure git
-          git config user.name "Vincent Demeester"
-          git config user.email "vdemeest@redhat.com"
+          git config user.name "tekton-robot"
+          git config user.email "tekton-robot@users.noreply.github.com"
 
           # Create a new branch
           BRANCH="dependabot-regen-$(date +%Y%m%d-%H%M%S)"