fix: Improve grammar and clarify phrasing in README.md

[snowykr]

Description

This pull request addresses a grammatical error and improves the clarity of a sentence in the README.md file.

Changes Made

• In the "Benchmark" section, the sentence "For the model layout that do not supported by any public model..." has been updated.
• The phrase "model layout that do not supported" has been corrected to "model layouts that are not supported" to:
  • Fix the grammatical error ("do not supported").
  • Use the plural form "layouts" with "are not supported" to refer more broadly to the class of unsupported model layouts, which is more accurate and natural for documentation.

Reason for Change

The original phrasing contained a grammatical error and could be more clearly articulated. This fix enhances the readability and accuracy of the documentation by using correct grammar and more appropriate phrasing.