docs: replace PNG image with SVG format

[hrntknr]

Summary

(Brief description of what this PR accomplishes)

Type of Change

• feat: A new feature
• fix: A bug fix
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• refactor: A code change that neither fixes a bug nor adds a feature
• perf: A code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to our CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit

Related Issues

[Copilot]

Pull Request Overview

This PR replaces a PNG image file with an SVG format version in the README documentation. The change updates the image reference to use a vector format that typically provides better scalability and smaller file sizes for documentation.

Key Changes

• Updated image file reference from PNG to SVG format in README

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