Fix broken title

[nhedger]

Why:

Fix a broken title.

I suspect a newline between {% endpowershell %} and the title is needed, otherwise, the title does not render properly.

What's being changed:

Adds a newline before the ## Grouping log lines title.

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Content directory changes

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Source	Preview	Production	What Changed
content/actions/using-workflows/workflow-commands-for-github-actions.md	Modified	Original

[nhedger]

I've checked the modification on the preview environment and the change restores the title as expected.

[ramyaparimi]

@nhedger
Thanks so much for opening a PR with this fix! I'll get this merged once tests are passing 🍏

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