ci(holidays): update reviewers and branch name (#632)

Author: naveensingh

.github/workflows/holiday-generator.yml

@@ -33,6 +33,9 @@ jobs:
         with:
           token: ${{ steps.app-token.outputs.token }}
           sign-commits: true
+          assignees: naveensingh
+          reviewers: naveensingh
+          branch: fossifybot/holidays
           commit-message: "chore: update holidays"
           title: "chore: update holidays"
           body: " "