Check `bin/cssmoke.py` in `release.yml` workflow

[julienloizelet]

When we run the release.yml workflow, we are checking some files to ensure the released version is the expected one:

crowdsec-splunk-app/.github/workflows/release.yml

Line 46 in 004195f

# CHANGELOG.md, app.manifest, default/app.conf, appserver/static/javascript/setup_page.js

We should add a check for the bin/cssmoke.py file (as it mentions the version too):

crowdsec-splunk-app/bin/cssmoke.py

Line 127 in 004195f

"User-Agent": "crowdSec-splunk-app/v1.2.3",