docs: improve image size descriptions

[Prembhalerao-2006]

Description

Motivation and Context

Testing Details

Example Output(if appropriate)

Types of changes

• Documentation
• Version change (Update, remove or add more Node.js versions)
• Variant change (Update, remove or add more variants, or versions of variants)
• 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 change)
• Other (none of the above)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING.md document.
• All new and existing tests passed.

[MikeMcC399]

There is already an open PR to rewrite this text. See #2496

[MikeMcC399]

Closing, as the changes are to writing style only.
The changes also fail linting.
In addition the changes would be obsolete if PR #2496 is merged.