docs: minor fix to html renderer link text

[marcolussetti]

Description

Fixes text for the HTML Renderer Link which is currently mislabelled as Markdown Renderer.

Closes #8

What change does this PR introduce?

Please select the relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to docs/code comments)

What is the proposed approach?

Replace incorrect text with correct text

Checklist:

• The commit message follows our adopted guidelines
• Testing has been done for the change(s) added (for bug fixes/features)
• Relevant comments/docs have been added/updated (for bug fixes/features)
  • This is a doc fix

[tjtanjin]

Thank you for the catch! @marcolussetti 😊