[BUG]: workflow treated as invalid if it contains a disabled step

[firewave]

Pre-submission checks

• I am not filing a feature request. These should be filed via the feature request form instead.
• I have looked through the open issues for a duplicate report.

Expected behavior

The workflow is successfully analyzed.

Actual behavior

The analysis fails saying the workflow is invalid.

Reproduction steps

Analyze the included workflow.

Logs

failed to register workflow: ".github/workflows/workflow.yml"

Caused by:
    0: couldn't load workflow from file
    1: invalid GitHub Actions workflow: ".github/workflows/workflow.yml"
    2: jobs: data did not match any variant of untagged enum Job at line 6 column 3

Additional context

name: Name

on: [push]

jobs:
  build:
    runs-on: ubuntu-22.04
    steps:
      - name: Step
        if: false
        run: echo

[woodruffw]

Thanks for the report @firewave! I'll triage this in a bit.

[woodruffw]

I've root-caused this as an incorrect assumption in my handling of conditions; the fix is in #17.

[woodruffw]

Done; this will be bumped into a zizmor release pretty soon.