Linting: fix bug when linting subworkflows from pipeline lint [skip changelog]

[mirpedrol]

Fix a bug introduced with #2677

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[mashehu]

should we test for this or you think it was an outlier?

[mirpedrol]

We are not running the linting of a pipeline, that's why me missed this, as linting subworkflows alone worked.

tools/tests/test_lint.py

Lines 57 to 58 in 50d56f6

	We don't really check any of this code as it's just a series of function calls
	and we're testing each of those individually. This is mostly to check for syntax errors."""

Do we want to actually run it?

[mashehu]

I see, maybe fine for now then