Description

Based upon a discussion in Discord.

Users tend to copy from the docs, so update the hx-trigger example to use the input event rather than keyup, since that will also react to other activity such as via a mouse (e.g. drag to select text, right click and cut).

Checklist

• I have read the contribution guidelines
• I have targeted this PR against the correct branch (master for website changes, dev for
  source changes)
• This is either a bugfix, a documentation update, or a new feature that has been explicitly
  approved via an issue
• I ran the test suite locally (npm run test) and verified that it succeeded