✨ Sync transpose with problem-specifications

[homersimpsons]

Follow-up from this topic: https://forum.exercism.org/t/transpose-ensure-all-lines-are-right-trimmed/5165

• mixed line length was already in the exercises/practice/transpose/.meta/tests.toml file
• jagged triangle was missing too so I went ahead and synced it too

@SleeplessByte

[github-actions]

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[tejasbubane]

Thanks @homersimpsons 👍