Add missing docs for timeout parameter in WebSocketResponse.__init__()

[lenard-mosys]

What do these changes do?

Adds missing documentation.

Are there changes in behavior for the user?

No.

Is it a substantial burden for the maintainers to support this?

No

Related issue number

This was easier than opening an issue.

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
• Add a new news fragment into the CHANGES/ folder

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.59%. Comparing base (da0099d) to head (26b9e58).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9497   +/-   ##
=======================================
  Coverage   98.59%   98.59%           
=======================================
  Files         105      105           
  Lines       35093    35097    +4     
  Branches     4179     4179           
=======================================
+ Hits        34600    34604    +4     
  Misses        329      329           
  Partials      164      164           

Flag	Coverage Δ
CI-GHA	98.47% <ø> (+<0.01%)	⬆️
OS-Linux	98.14% <ø> (+<0.01%)	⬆️
OS-Windows	96.53% <ø> (+<0.01%)	⬆️
OS-macOS	97.83% <ø> (+<0.01%)	⬆️
Py-3.10.11	97.70% <ø> (+<0.01%)	⬆️
Py-3.10.15	97.63% <ø> (+<0.01%)	⬆️
Py-3.11.10	97.70% <ø> (-0.01%)	⬇️
Py-3.11.9	97.78% <ø> (-0.01%)	⬇️
Py-3.12.7	98.19% <ø> (+<0.01%)	⬆️
Py-3.13.0	98.18% <ø> (+<0.01%)	⬆️
Py-3.9.13	97.60% <ø> (+<0.01%)	⬆️
Py-3.9.20	97.53% <ø> (+<0.01%)	⬆️
Py-pypy7.3.16	97.16% <ø> (+<0.01%)	⬆️
VM-macos	97.83% <ø> (+<0.01%)	⬆️
VM-ubuntu	98.14% <ø> (+<0.01%)	⬆️
VM-windows	96.53% <ø> (+<0.01%)	⬆️

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