fix: add the correct enterkeyhint to the comment composer

[ublefo]

Description

Was trying to reproduce https://github.com/doubtfire-lms/doubtfire-web/issues/705 and turns out it's already fixed in development. Only remaining thing to address was enterkeyhint, which makes enter buttons on mobile devices display the correct icon or text.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Tested sending messages and making sure the enter key has the correct icon/text on iOS 17.3.1 with Safari, and on Android 14 with Firefox

Before:

After:

Testing Checklist:

• [ ] Tested in latest Chrome
• [x] Tested in latest Safari
• [x] Tested in latest Firefox

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] My changes generate no new warnings

[jakerenzella]

Love this!