✨ update main.py to support instrument with number like US500

[mraniki]

No description provided.

[sourcery-ai]

Hey @mraniki - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Docstrings: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (7ffe0de) to head (6a71565).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #364   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           59        59           
=========================================
  Hits            59        59           

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