Update to Chromium 126

[MaxIhlenfeldt]

Release notes:

• https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop.html
• https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop_13.html
• https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop_18.html
• https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop_24.html

[MaxIhlenfeldt]

Will start working on this once #825 has been merged.