[PR #5835 backport][3.9] Fix(doc): ClientResponse.release

[cdce8p]

What do these changes do?

Backport changes from #5835 to the 3.9 branch.
ClientResponse.release should be marked as method not coroutine.

[codecov]

Codecov Report

Merging #7554 (3135342) into 3.9 (b9b0906) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              3.9    #7554      +/-   ##
==========================================
- Coverage   97.31%   97.30%   -0.02%     
==========================================
  Files         107      107              
  Lines       31676    31676              
  Branches     3665     3665              
==========================================
- Hits        30825    30821       -4     
- Misses        646      651       +5     
+ Partials      205      204       -1     

Flag	Coverage Δ
CI-GHA	97.25% <ø> (-0.02%)	⬇️
OS-Linux	96.93% <ø> (ø)
OS-Windows	94.45% <ø> (ø)
OS-macOS	96.61% <ø> (-0.02%)	⬇️
Py-3.10.11	94.36% <ø> (ø)
Py-3.10.12	96.80% <ø> (-0.02%)	⬇️
Py-3.11.4	96.51% <ø> (ø)
Py-3.8.10	94.33% <ø> (ø)
Py-3.8.17	96.74% <ø> (ø)
Py-3.9.13	94.34% <ø> (ø)
Py-3.9.17	96.78% <ø> (ø)
Py-pypy7.3.11	96.30% <ø> (ø)
VM-macos	96.61% <ø> (-0.02%)	⬇️
VM-ubuntu	96.93% <ø> (ø)
VM-windows	94.45% <ø> (ø)

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see 1 file with indirect coverage changes

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