Fix links in 3.3.1 announcement to really point to 3.3.1

They were copy-and-pasted from 3.3.0 announcement and not updated.

Closes wxWidgets/wxWidgets#25661

Author: vadz

_posts/2025-07-20-wxwidgets-3.3.1-released.md

@@ -56,9 +56,9 @@ the breaking changes in it.
 Thanks to all the people who have contributed to this release and we hope you
 will find it useful and will enjoy working with it!
 
-[github]: https://github.com/wxWidgets/wxWidgets/releases/tag/v3.3.0
-[docs]: https://docs.wxwidgets.org/3.3.0/
-[install]: https://docs.wxwidgets.org/3.3.0/overview_install.html
+[github]: https://github.com/wxWidgets/wxWidgets/releases/tag/v3.3.1
+[docs]: https://docs.wxwidgets.org/3.3.1/
+[install]: https://docs.wxwidgets.org/3.3.1/overview_install.html
 [changes]: https://raw.githubusercontent.com/wxWidgets/wxWidgets/v3.3.1/docs/changes.txt
 [3.3.0-release]: news/2025/06/wxwidgets-3.3.0-released
 [#23766]: https://github.com/wxWidgets/wxWidgets/issues/23766