fix: add if guard to no-response job to prevent running on workflow_dispatch

Prevents no-response from accidentally closing issues when manually
dispatching the workflow for pitch surfacing.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/workflows/triage-scheduled-tasks.yml

@@ -10,6 +10,7 @@ on:
 
 jobs:
   no-response:
+    if: github.event_name == 'issue_comment' || github.event.schedule == '5 * * * *'
     uses: desktop/gh-cli-and-desktop-shared-workflows/.github/workflows/triage-no-response-close.yml@main
     permissions:
       issues: write