Update pr-checklist.yml

Author: kolchfa-aws

.github/workflows/pr-checklist.yml

@@ -29,5 +29,5 @@ jobs:
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              assignees: [hdhalter]
+              assignees: "hdhalter"
             })