Update file(s) from wp-cli/.github

Author: swissspidy

.github/workflows/issue-triage.yml

@@ -1,18 +1,26 @@
 ---
-name: Issue Triage
+name: Issue and PR Triage
 
 'on':
   issues:
     types: [opened]
+  pull_request:
+    types: [opened]
   workflow_dispatch:
     inputs:
       issue_number:
-        description: 'Issue number to triage (leave empty to process all)'
+        description: 'Issue/PR number to triage (leave empty to process all)'
         required: false
         type: string
 
 jobs:
   issue-triage:
     uses: wp-cli/.github/.github/workflows/reusable-issue-triage.yml@main
     with:
-      issue_number: ${{ github.event_name == 'workflow_dispatch' && inputs.issue_number || github.event.issue.number }}
+      issue_number: >-
+        ${{
+          (github.event_name == 'workflow_dispatch' && inputs.issue_number) ||
+          (github.event_name == 'pull_request' && github.event.pull_request.number) ||
+          (github.event_name == 'issues' && github.event.issue.number) ||
+          ''
+        }}