update base branch from dev to main

Author: Bai-Li-NOAA

.github/workflows/call-allcontributors.yml

@@ -33,7 +33,7 @@ jobs:
               with:
                 commit-message: "chore: Updates contributors"
                 branch: update-contributors
-                base: dev
+                base: main
                 title: "Update contributors"
                 body: "This PR updates the contributors list."
                 labels: "auto-update"