Fix namespacing of pseudo-classes

[bencroker]

This (tiny) PR fixes the namespacing of pseudo-classes within <style> tags by adding a : to the list of possible characters that can follow a class name.

Before:

// Outputs `<style>.ns-a, .b:hover</style>`
Html::namespaceHtml('<style>.a, .b:hover</style>', 'ns', true))

After:

// Outputs `<style>.ns-a, .ns-b:hover</style>`
Html::namespaceHtml('<style>.a, .b:hover</style>', 'ns', true))

Discovered and reported via Discord by @maxstrebel.

[brandonkelly]

Thanks!

[brandonkelly]

Craft 4.4.14 is out with this fix.