docs: Fix typo in react-labs-view-transitions-activity-and-more.md

[Dev-5804]

Summary
Fixes a small typo in a code comment within the installation guide.

Test Plan
Go to the file react-labs-view-transitions-activity-and-more.md

Confirm that the typo has been corrected and the text reads as intended.

Related Issue
Fixes #7887

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[github-actions]

Size changes

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

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