fix: correct ref and ref_name

[KnisterPeter]

The ref in the GitHub context is always full qualified (e.g. refs/heads/branch, refs/tags/v1).
The ref_name is the ref with the stripped prefix.

In case of pull_requests, this is the merge commit ref (e.g. refs/pull/123/merge -> 123/merge).

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	3		0	0.02s
✅ REPOSITORY	gitleaks	yes		no	2.43s
✅ REPOSITORY	git_diff	yes		no	0.0s
✅ REPOSITORY	secretlint	yes		no	1.34s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

MegaLinter is graciously provided by

[mergify]

@KnisterPeter this pull request has failed checks 🛠

[codecov]

Codecov Report

Merging #1672 (c62298f) into master (4989f44) will increase coverage by 1.48%.
The diff coverage is 73.66%.

@@            Coverage Diff             @@
##           master    #1672      +/-   ##
==========================================
+ Coverage   61.22%   62.71%   +1.48%     
==========================================
  Files          46       48       +2     
  Lines        7141     7458     +317     
==========================================
+ Hits         4372     4677     +305     
+ Misses       2462     2461       -1     
- Partials      307      320      +13     

Impacted Files	Coverage Δ
pkg/container/docker_cli.go	82.23% <ø> (ø)
pkg/container/docker_logger.go	52.08% <ø> (ø)
pkg/container/docker_pull.go	33.33% <ø> (ø)
pkg/container/docker_run.go	14.08% <0.00%> (+0.49%)	⬆️
pkg/container/docker_volume.go	0.00% <ø> (ø)
pkg/container/file_collector.go	37.30% <0.00%> (ø)
pkg/container/host_environment.go	0.00% <0.00%> (ø)
pkg/exprparser/functions.go	66.32% <0.00%> (-1.04%)	⬇️
pkg/model/workflow.go	42.11% <ø> (ø)
pkg/model/planner.go	44.71% <21.27%> (-4.12%)	⬇️
... and 30 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more