workflow: Buildsize comment when simulator fails

The workflow checks that the buildsize comparison succeeds. The download
artifact step also checks that all of the main workflow succeeds. This
isn't necessary, and causes the comment not to be created when the
simulator build fails. This change disabled the success conclusion
requirement.

.github/workflows/pr-comment.yml

@@ -29,6 +29,7 @@ jobs:
       uses: dawidd6/action-download-artifact@bd10f381a96414ce2b13a11bfa89902ba7cea07f
       with:
         workflow: main.yml
+        workflow_conclusion:
         pr: ${{ github.event.pull_request.number }}
         name: comment