Fix missing type on URL.port

[bdraco]

What do these changes do?

Fix missing type on URL.port

Are there changes in behavior for the user?

Fixes mypy error

Related issue number

fixes #1096

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.90%. Comparing base (fd25c6f) to head (487c1ab).
Report is 314 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1097      +/-   ##
==========================================
+ Coverage   94.81%   94.90%   +0.09%     
==========================================
  Files          30       30              
  Lines        4358     4358              
  Branches      382      382              
==========================================
+ Hits         4132     4136       +4     
+ Misses        200      196       -4     
  Partials       26       26              

Flag	Coverage Δ
CI-GHA	94.86% <100.00%> (+0.09%)	⬆️
MyPy	39.11% <100.00%> (+0.19%)	⬆️
OS-Linux	99.34% <100.00%> (+0.05%)	⬆️
OS-Windows	99.44% <100.00%> (ø)
OS-macOS	99.02% <100.00%> (?)
Py-3.10.11	98.90% <100.00%> (-0.41%)	⬇️
Py-3.10.14	99.16% <100.00%> (ø)
Py-3.11.9	99.16% <100.00%> (ø)
Py-3.12.5	99.16% <100.00%> (ø)
Py-3.13.0-rc.1	99.16% <100.00%> (ø)
Py-3.8.10	98.85% <100.00%> (-0.41%)	⬇️
Py-3.8.18	99.11% <100.00%> (+0.03%)	⬆️
Py-3.9.13	98.85% <100.00%> (?)
Py-3.9.19	99.11% <100.00%> (+0.25%)	⬆️
Py-pypy7.3.11	99.16% <100.00%> (?)
Py-pypy7.3.16	99.16% <100.00%> (?)
Py-pypy7.3.17	99.19% <100.00%> (?)
VM-macos-latest	99.02% <100.00%> (?)
VM-ubuntu-latest	99.34% <100.00%> (+0.05%)	⬆️
VM-windows-latest	99.44% <100.00%> (ø)
pytest	99.34% <100.00%> (+0.05%)	⬆️

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