Use fluxcdbot token in CI

.github/workflows/update.yml

@@ -54,10 +54,10 @@ jobs:
         id: cpr
         uses: peter-evans/create-pull-request@v3
         with:
-            token: ${{ secrets.GITHUB_TOKEN }}
+            token: ${{ secrets.BOT_GITHUB_TOKEN }}
             commit-message: Update toolkit components
             committer: GitHub <noreply@github.com>
-            author: ${{ github.actor }} <${{ github.actor }}@users.noreply.github.com>
+            author: fluxcdbot <fluxcdbot@users.noreply.github.com>
             title: Update toolkit components
             body: |
               ${{ steps.update.outputs.pr_body }}