Advanced Ruby : Changed some descriptive link texts

[LAKSHYA201]

Because

To improve accessibility , certain link texts in various lessons were required to be revamped.

This PR

• Changes in a link text in line 671 of pattern_matching.md
• Changes in various link texts of blocks.md
• Changes in a link text in line 45 of project_custom_enumerables.md

Issue

Related to #28290

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

[MaoShizhong]

One little nit below.

Would you also be comfortable fixing the remaining lint errors in the files for blocks and pattern_matching? I believe those errors should be fixable via our auto-fix scripts - you can follow our instructions for linting and fixing locally. You may need to run the fix:lesson script more than once on each of those files to catch and resolve all the errors.

Let me know if you run into any issues with this!