Correctly handle ipv6 localhost in Location

[philippjfr]

Handle ipv6 localhost.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.23%. Comparing base (fbb540d) to head (44fbf5b).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
panel/io/location.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7316      +/-   ##
==========================================
+ Coverage   82.20%   82.23%   +0.03%     
==========================================
  Files         337      337              
  Lines       50439    50441       +2     
==========================================
+ Hits        41462    41482      +20     
+ Misses       8977     8959      -18     

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