Ruby folder: update README.md

[01zulfi]

1. Description:

READMEs need to be updated throughout the curriculum repository.

Related to:

• Cleaning up folder/file structure in the curriculum repository top-meta#109

Course README template:

# <course_name>

/* in case course belongs to multiple paths, make sure to link those paths */ 

This folder contains lesson markdown files that make up the <course_name> course. This course exists in the [<path_name>](<path_link>) path on the Odin Project Website.

## Course Outline

The following list represents how the lessons are divided into sections and presented on the website.

**Disclaimer:** Given the ever updating nature of the curriculum, the outline might be outdated. See the [<course_name> course on the website](<course_link>)
instead.

### <section_name>

/* make sure the lesson order corresponds to the order on the website */
/* make sure to use relative links with respect to this README to link the markdown file */

1. [<lesson_name>](<lesson_markdown_file_link>)
2. [**<project_name>**](<project_markdown_file_link>)

2. Acceptance Criteria:

• Update Ruby folder's README.md file to the template provided above
• Remove comments from the template
• Fill in the appropriate information in the angle (<>) brackets in the template
  • Make sure to the path/course/lesson names correspond to what is on the website
• Use relative links to link the markdown files
  • For example use basic_ruby/arrays.md as the link to the markdown file instead of https://github.com/TheOdinProject/curriculum/blob/main/ruby/basic_ruby/arrays.md
  • Make sure the links work as intended

3. Additional Information:

If anyone wants to work on this, please comment to be assigned. In case of any questions, feel free to ask below.

[kzhang01]

Hi can I take this issue?