Fix project name typo in README.md

[Medha375]

issue #21 Fix Project Name Typo in README.md

Problem

The README.md had two issues:

1. Project name typo: "Algorithm-Visualizer-Platform" → should be "Algorithm-Visualiser-Platform".
2. Setup instructions suggested cloning using someone else’s GitHub username.

Solution

• Corrected the project name throughout README.md.
• Updated setup steps to guide contributors to fork and clone using their own GitHub account.
• Ensured all headings, badges, and references are consistent.

Note: No changes were made outside README.md.