Fix incorrect repository clone URL in README setup guide

[shrushtigaynar]

Description

The README currently contains a placeholder clone URL in the setup guide:

git clone https://github.com/yourusername/github-tracker.git

This may confuse contributors because the command will not work if copied directly.

The repository-specific clone command should instead use the actual repository URL:

git clone https://github.com/GitMetricsLab/github_tracker.git

Suggested Fix

Replace the placeholder clone URL in the README with the correct repository URL.

Benefits

• Improves contributor onboarding experience
• Prevents setup confusion for new contributors
• Makes the setup instructions directly usable

I would like to work on this issue under GSSoC 2026. Kindly assign this issue to me.