Ruby on Rails: Update turbo.md

[dwlknsn]

Because

1. Declaring a turbo_frame_tag without a block is used later in the lesson in the Turbo Streams section and (IMO) it was not obvious that you can call the tag without the closing <% end %> tag. After some digging into the docs, and experimentation I understood, but I though others may find this useful to be called out explicitly.
2. It's not conventional to explicitly use id= in a rails helper tag. This declaration style was not used in the first few examples in the lesson, but then suddenly appeared in the second half. I removed them for consistency and to follow the more idiomatic rails way.

This PR

• Fixes minor typo
• Adds an example of the turbo_frame_tag declaration without a block.
• Removes explicit declarations of id= in the turbo_frame_tags

Issue

Closes #XXXXX

Additional Information

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide

[JoshDevHub]

Nice additions 🚀