Try using hasConflicts tag

The action cannot find the tag using a space.

Author: atoomic

.github/workflows/detect-conflicts.yml

@@ -3,11 +3,11 @@ on:
     branches:
       - blead
 jobs:
-  triage:
+  conflicts:
     runs-on: ubuntu-latest
     if: ( github.event.pull_request.head.repo.full_name == 'Perl/perl5' || github.repository == 'Perl/perl5' )
     steps:
       - uses: mschilde/auto-label-merge-conflicts@master
         with:
-          CONFLICT_LABEL_NAME: "has conflicts"
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CONFLICT_LABEL_NAME: "hasConflicts"
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}