Add missing prepared method for WebSocketResponse to docs

[bdraco]

We now override this method so we should document it. I should have used :py:attr:~aiohttp.web.WebSocketResponse.prepared

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.77%. Comparing base (2617ab2) to head (a9b612d).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10988      +/-   ##
==========================================
+ Coverage   97.89%   98.77%   +0.87%     
==========================================
  Files         127      129       +2     
  Lines       39557    39624      +67     
  Branches     2176     2187      +11     
==========================================
+ Hits        38726    39137     +411     
+ Misses        672      339     -333     
+ Partials      159      148      -11     

Flag	Coverage Δ
CI-GHA	98.65% <ø> (+0.85%)	⬆️
OS-Linux	98.36% <ø> (?)
OS-Windows	96.54% <ø> (+0.04%)	⬆️
OS-macOS	97.51% <ø> (+0.20%)	⬆️
Py-3.10.11	97.40% <ø> (?)
Py-3.10.17	97.94% <ø> (?)
Py-3.11.12	98.02% <ø> (?)
Py-3.11.9	97.49% <ø> (+1.27%)	⬆️
Py-3.12.10	98.42% <ø> (+1.12%)	⬆️
Py-3.13.3	98.42% <ø> (?)
Py-3.9.13	97.28% <ø> (+1.26%)	⬆️
Py-3.9.22	97.80% <ø> (?)
Py-pypy7.3.16	93.60% <ø> (?)
VM-macos	97.51% <ø> (+0.20%)	⬆️
VM-ubuntu	98.36% <ø> (?)
VM-windows	96.54% <ø> (+0.04%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #10988 will not alter performance

_{Comparing changelog_message_tweak_6009 (a9b612d) with master (2617ab2)}

Summary

✅ 59 untouched benchmarks

[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/54f1a84f51f0aeceec04386f2eb237d430d9aa85/pr-10988

Backported as #10989

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.12: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.12/54f1a84f51f0aeceec04386f2eb237d430d9aa85/pr-10988

Backported as #10990

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.