Add accessibility note for Global South participants

[sehajdeep-dot]

Summary

Added a section in README.md to improve accessibility and inclusiveness for participants from the Global South. This includes simplifying visa processes and providing guidance to encourage global participation.

Motivation

Ensuring equal opportunities for all researchers aligns with the project's mission to be inclusive and globally accessible.

Changes Made

• Added new section under "Improving Accessibility" in README.md

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[github-actions[bot]]

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[sehajdeep-dot]

Hi! This PR is ready for review.
Please let me know if any changes are required. Thanks!

[sehajdeep-dot]

Hi @bozicb @Oloni,
This PR is ready for review. All checks have passed.
Kindly requesting an approval whenever you get time. Thanks!