Do not run reviewer lottery on bot PRs (#1250) (#1251)

Author: mergify[bot]

.github/workflows/reviewer_lottery.yml

@@ -6,6 +6,7 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
+    if: github.actor != 'dependabot[bot]' && github.actor != 'mergify[bot]'
     steps:
     - uses: actions/checkout@v4
     - uses: uesteibar/reviewer-lottery@v3