docs: fix typo in FAQ

[ajrambo]

Removed the word 'similar' which appeared to be a leftover typo in the 'How do I keep my app up to date?' section.

Closes #

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

Fixed a typo in the FAQ section regarding the postinstall CLI tool.

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Screenshots

[Screenshots]

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Project	Deployment	Actions	Updated (UTC)
create-t3-app	Ready	Preview, Comment	Feb 16, 2026 2:36am