quote report body

Author: jeromevdl

.github/workflows/build.yml

@@ -93,7 +93,7 @@ jobs:
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: ${{ steps.artifacts-size-report.outputs.ARTIFACT_REPORT }}
+              body: "${{ steps.artifacts-size-report.outputs.ARTIFACT_REPORT }}"
             })
 
   savepr: