Documentation: Improve virtualenvwrapper setup instructions for new contributors

[Heyshubham]

Fixes #7739

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.38%. Comparing base (1deffd6) to head (4889c8c).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #7741    +/-   ##
========================================
  Coverage   99.38%   99.38%            
========================================
  Files        1091     1090     -1     
  Lines       97919    98232   +313     
========================================
+ Hits        97313    97627   +314     
+ Misses        606      605     -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[pavoljuhas]

Thank you for adding this!