Update triaging guidelines (opensearch-project#2899)

* Update triaging guidelines

Signed-off-by: Stephen Crawford <steecraw@amazon.com>
Signed-off-by: Stephen Crawford <65832608+scrawfor99@users.noreply.github.com>

Author: stephen-crawford

TRIAGING.md

@@ -25,9 +25,8 @@ Meetings are lightly structured as follows:
 1. Announcements: If there are any announcements to be made they will happen at the start of the meeting.
 2. Review of new issues: The meetings always start with reviewing all untriaged [issues](https://github.com/search?q=label%3Auntriaged+is%3Aopen++repo%3Aopensearch-project%2Fsecurity+repo%3Aopensearch-project%2Fsecurity-dashboards-plugin&type=issues&ref=advsearch&s=created&o=desc) for the security and security-dashboards repositories.
 3. Untriaged items: Review any [issues](https://github.com/search?q=-label%3Atriaged+is%3Aopen++is%3Aissue+repo%3Aopensearch-project%2Fsecurity+repo%3Aopensearch-project%2Fsecurity-dashboards-plugin&type=issues) that might have had the 'untriaged' label removed but require additional triage discussion.
-4. Open discussion: Next, we open the floor in case anyone wants to highlight an issue.
-5. Backlog discussion: Then, we review issues from the [backlogs](https://github.com/search?q=label%3A%22sprint+backlog%22+is%3Aopen++repo%3Aopensearch-project%2Fsecurity+repo%3Aopensearch-project%2Fsecurity-dashboards-plugin&type=issues&ref=advsearch&s=created&o=desc) of the security and security-dashboards repositories.
-6. Least recent discussed issue: Finally, to close out the meeting we will [review the oldest](https://github.com/search?q=+is%3Aopen++repo%3Aopensearch-project%2Fsecurity+repo%3Aopensearch-project%2Fsecurity-dashboards-plugin&type=issues&ref=advsearch&s=updated&o=asc) issues from both repositories, security and security-dashboards, to help identify issues that have languished.
+4. Pull request discussion: Then, we review the status of outstanding [pull requests](https://github.com/search?q=+is%3Aopen++repo%3Aopensearch-project%2Fsecurity+repo%3Aopensearch-project%2Fsecurity-dashboards-plugin&type=pullrequests&ref=advsearch) from the security and security-dashboards repositories.
+5. Open discussion: Finally, we open the floor in case anyone wants to highlight an issue.
 
 There is no specific ordering within each category.