Check if .error contains any info

Signed-off-by: Jesse Whitehouse <[email protected]>

Author: susodapop

.github/workflows/dco-check.yml

@@ -18,5 +18,5 @@ jobs:
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: "${{ join(steps.run_tests.errors.*, '\n') }}"
+              body: "${{ steps.run_tests.error }}"
             })