[New curl version] 8.9.1

[github-actions]

https://github.com/curl/curl/releases/tag/curl-8_9_1

[dscho]

/open pr

The MSYS workflow run was started

The MINGW workflow run was started

[dscho]

Based on the release blog post, I am unsure whether this, on its own, merits an emergency v2.46.0(2). For that reason, I'll try to integrate the package, but let it simmer for a while.