[PR #7673/aa7d1a8f backport][3.10] Document release process

[patchback]

This is a backport of PR #7673 as merged into master (aa7d1a8).

@webknjaz We really need to document this somewhere. Is this an acceptable place?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (566f346) 97.35% compared to head (b8e00e1) 97.35%.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #7910   +/-   ##
=======================================
  Coverage   97.35%   97.35%           
=======================================
  Files         108      108           
  Lines       32459    32459           
  Branches     3849     3849           
=======================================
  Hits        31600    31600           
  Misses        655      655           
  Partials      204      204           

Flag	Coverage Δ
CI-GHA	97.26% <ø> (ø)
OS-Linux	96.95% <ø> (ø)
OS-Windows	94.45% <ø> (-0.01%)	⬇️
OS-macOS	96.76% <ø> (+0.19%)	⬆️
Py-3.10.11	94.35% <ø> (ø)
Py-3.10.13	96.72% <ø> (-0.01%)	⬇️
Py-3.11.6	96.49% <ø> (+0.03%)	⬆️
Py-3.12.0	96.50% <ø> (?)
Py-3.8.10	94.33% <ø> (-0.01%)	⬇️
Py-3.8.18	96.66% <ø> (ø)
Py-3.9.13	94.34% <ø> (ø)
Py-3.9.18	96.71% <ø> (+<0.01%)	⬆️
Py-pypy7.3.13	96.17% <ø> (ø)
VM-macos	96.76% <ø> (+0.19%)	⬆️
VM-ubuntu	96.95% <ø> (ø)
VM-windows	94.45% <ø> (-0.01%)	⬇️

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