Fix decay model name

3 jobs for etaDalitz in 21 minutes and 9 seconds (queued for 4 seconds)
Name Stage Failure
failed
check-decfiles Test
$ ls check_logs | awk -f tests/ci-summary.awk
Failures:
- Ds_etamunu,gmm=Eta2MuMuGamma,DecProdCut
Uploading artifacts for failed job
Uploading artifacts...
check_logs: found 5 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=17600968 responseStatus=201 Created token=vZm1MLgX
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1