fix: update validate_station function

[firstof9]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.12%. Comparing base (39fc87f) to head (54f1224).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
custom_components/gasbuddy/config_flow.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #157   +/-   ##
=======================================
  Coverage   86.12%   86.12%           
=======================================
  Files           7        7           
  Lines         447      447           
=======================================
  Hits          385      385           
  Misses         62       62           

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