Fix Lexy "@endunless" wrong rendering

[Raruto]

Proposal bugfix for: https://github.com/agentejo/cockpit/issues/1347

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Related info:

• https://laravel.com/docs/8.x/blade#if-statements
• https://cpmultiplane.rlj.me/en/docs/lexy

Have a nice Day, Raruto

[aheinze]

Thanks!