Use pull_request_target for PR triage to support forks (#189)

Co-authored-by: swissspidy <[email protected]>
Co-authored-by: copilot-swe-agent[bot] <[email protected]>

Author: Copilot

.github/workflows/issue-triage.yml

@@ -4,7 +4,7 @@ name: Issue and PR Triage
 'on':
   issues:
     types: [opened]
-  pull_request:
+  pull_request_target:
     types: [opened]
   workflow_dispatch:
     inputs:
@@ -20,7 +20,7 @@ jobs:
       issue_number: >-
         ${{
           (github.event_name == 'workflow_dispatch' && inputs.issue_number) ||
-          (github.event_name == 'pull_request' && github.event.pull_request.number) ||
+          (github.event_name == 'pull_request_target' && github.event.pull_request.number) ||
           (github.event_name == 'issues' && github.event.issue.number) ||
           ''
         }}

.github/workflows/reusable-issue-triage.yml

@@ -19,7 +19,7 @@ permissions:
 jobs:
   triage-new-item:
     name: Triage New Issue or PR
-    if: github.event_name == 'issues' || github.event_name == 'pull_request'
+    if: github.event_name == 'issues' || github.event_name == 'pull_request_target'
     runs-on: ubuntu-latest
     steps:
       - name: Get available labels
@@ -37,9 +37,9 @@ jobs:
 
       - name: Set environment variables
         env:
-          ITEM_TITLE: ${{ github.event_name == 'pull_request' && github.event.pull_request.title || github.event.issue.title }}
-          ITEM_BODY: ${{ github.event_name == 'pull_request' && github.event.pull_request.body || github.event.issue.body }}
-          ITEM_TYPE: ${{ github.event_name == 'pull_request' && 'pull request' || 'issue' }}
+          ITEM_TITLE: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.title || github.event.issue.title }}
+          ITEM_BODY: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.body || github.event.issue.body }}
+          ITEM_TYPE: ${{ github.event_name == 'pull_request_target' && 'pull request' || 'issue' }}
           LABELS_RESULT: ${{ steps.get-labels.outputs.result }}
         run: |
           {