fix(web): Fix typo in license-activation error popup

[MisterrrX]

The error popup that appears after entering an invalid license key contains a small typo.

Previous:

"Failed to activate license. Please check your email for the the correct license key!"

New:

"Failed to activate license. Please check your email for the correct license key!"

[michelheusschen]

This has already been changed using Weblate, see #11165

[alextran1502]

Outdated