fix: decrease page size for github graphql pr collector (#4668) (#4669)

diff --git a/backend/plugins/github_graphql/tasks/pr_collector.go b/backend/plugins/github_graphql/tasks/pr_collector.go
index a71ea1c..c9e605b 100644
--- a/backend/plugins/github_graphql/tasks/pr_collector.go
+++ b/backend/plugins/github_graphql/tasks/pr_collector.go
@@ -164,7 +164,7 @@
 
 	err = collectorWithState.InitGraphQLCollector(api.GraphqlCollectorArgs{
 		GraphqlClient: data.GraphqlClient,
-		PageSize:      30,
+		PageSize:      10,
 		Incremental:   incremental,
 		/*
 			(Optional) Return query string for request, or you can plug them into UrlTemplate directly