[Typo]: Duplicate v19.2.1 entries on React Versions page

[DARSHANCSE]

Summary

The React Versions page lists v19.2.1 twice with different dates/anchors. This looks like a duplicate/mislabeled entry.

Page

https://react.dev/versions

Details

Steps to reproduce

1. Open https://react.dev/versions
2. Find the entries for v19.2.1
   Actual result
   Two separate v19.2.1 entries appear with different dates/anchors (e.g., add add-react-redux-thunk #1922-dec-11-2025 and Adding Summarize: The News App #1921-dec-3-2025), both labeled v19.2.1 (December, 2025).
   Expected result
   Only one v19.2.1 entry should appear, matching the canonical release date in the React changelog.