Update webkit to 2.34.1

[jhaygood86]

This updates to the latest webkit release (2.34). We might want to do this in the flatpak platform eventually as well (or instead of here) since the upstream GNOME platform we use (3.38) is no longer maintained now that GNOME 41 is out.

This fixes two security advisories:
https://webkitgtk.org/security/WSA-2021-0005.html
https://webkitgtk.org/security/WSA-2021-0006.html

It also includes a lot of web platform updates and bugfixes:
https://webkitgtk.org/2021/09/22/webkitgtk2.34.0-released.html
https://webkitgtk.org/2021/10/21/webkitgtk2.34.1-released.html

It also fixes #39.

[alatiera]

No application should really bundle a web engine, apart from being a huge paint to build, its also a serious security concern.

[jhaygood86]

Well, we can move the update to the elementary platform.

As it stands, there are unfixed security issues and crashing bugs since WebKit is not maintained in the elementary Platform, and the upstream GNOME platform is EOL so isn't receiving feature or security updates.

Either way, we should update it somewhere

[danirabbit]

Yeah I agree with @alatiera here that it doesn't make sense to bundle this here. It would be better to update in the plaform.

Something to look at is elementary/flatpak-platform#52 and if we can safely rev the 6 runtime to be based on the GNOME 40 runtime without API breaks or if we should create a 6.1 runtime built on GNOME 40 and migrate things to that