Description of the problem

The .github/CONTRIBUTING.md file contained grammatical inconsistencies, typos, and failed standard Markdown linting rules. Specifically, it had inconsistent heading levels (skipping from H1 to H3), causing MD001 errors.

Describe the algorithm of actions that leads to the problem

N/A - This is a documentation refactor, not a logic bug.

Reproducing the problem

# N/A - Documentation fix only.

Description of the Changes

Refactored the CONTRIBUTING.md file to improve clarity, grammar, and formatting:

• Heading Hierarchy: Fixed MD001 errors by standardizing top-level sections to H2 (##) instead of H3 (###).
• Grammar & Tone: Updated phrasing for clarity (e.g., changing "Check that..." to "Verify that...") and fixed minor typos (e.g., "an images" -> "images").
• Formatting: Enforced an 80-character line limit on the updated text for better readability and MD013 compliance.

Code for testing new changes

# N/A - Changes are in .github/CONTRIBUTING.md

Checklist

• I have read the contribution guidelines.
• I have tested the changes (verified rendering and formatting).