Fix incorrect backtick.

10 jobs for poetry in 48 minutes and 2 seconds (queued for 8 seconds)
Name Stage Failure
failed
test_api_3.10 Test
Uploading artifacts for failed job
Uploading artifacts...
WARNING: api/report.xml: no matching files
ERROR: No files to upload
Uploading artifacts...
WARNING: api/coverage.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1