[3.10] Bump pypa/cibuildwheel to v2.20.0

[bdraco]

We want to start building wheels for 3.13 to unblock uvloop

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.69%. Comparing base (92dc91b) to head (5a9ea50).
Report is 1 commits behind head on 3.10.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #8740   +/-   ##
=======================================
  Coverage   97.69%   97.69%           
=======================================
  Files         108      108           
  Lines       34164    34164           
  Branches     4063     4063           
=======================================
  Hits        33378    33378           
  Misses        587      587           
  Partials      199      199           

Flag	Coverage Δ
CI-GHA	97.59% <ø> (ø)
OS-Linux	97.26% <ø> (-0.01%)	⬇️
OS-Windows	94.80% <ø> (ø)
OS-macOS	96.94% <ø> (ø)
Py-3.10.11	97.02% <ø> (ø)
Py-3.10.14	96.97% <ø> (ø)
Py-3.11.9	97.21% <ø> (ø)
Py-3.12.4	97.30% <ø> (ø)
Py-3.8.10	94.44% <ø> (ø)
Py-3.8.18	96.78% <ø> (ø)
Py-3.9.13	96.93% <ø> (ø)
Py-3.9.19	96.89% <ø> (ø)
Py-pypy7.3.16	96.48% <ø> (+<0.01%)	⬆️
VM-macos	96.94% <ø> (ø)
VM-ubuntu	97.26% <ø> (-0.01%)	⬇️
VM-windows	94.80% <ø> (ø)

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