Fix Typo in README.org

[VitalikBerashvili]

Pull Request: Fix Typo in README.org

Description

This pull request corrects a typo in the README.org file. Specifically, the word "modifcations" was corrected to "modifications" in the instructions.

• Before: "git stash # there are some local modifcations to set the localhost network"
• After: "git stash # there are some local modifications to set the localhost network"

This change improves the clarity and correctness of the documentation.

References (if applicable)

• N/A (If applicable, link to related issues or discussions here)

Checklist

• Code follows the repository’s coding conventions
• Changes are described in the PR
• Tests have been added/updated (if applicable)
• Documentation has been updated (if necessary)