Just fixed a typo.

[neuark]

Just fixed a typo .

Fix #18338

Change completed to complete.

Contributed by @neuark .

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[MadLittleMods]

Per the PR checklist (was in the PR description template), this needs a changelog entry -> changelog.d/19072.doc

• Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
  • Use markdown where necessary, mostly for code blocks.
  • End with either a period (.) or an exclamation mark (!).
  • Start with a capital letter.
  • Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.