[PR #7927/da2e349a backport][3.9] Pin proxy.py to 2.4.4rc4 for testing

[patchback]

This is a backport of PR #7927 as merged into master (da2e349).

What do these changes do?

Restores proxy.py to use 2.4.4rc4 per #7773 (comment)

Are there changes in behavior for the user?

Related issue number

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
  • The format is <Name> <Surname>.
  • Please keep alphabetical order, the file is sorted by names.
• Add a new news fragment into the CHANGES folder
  • name it <issue_id>.<type> for example (588.bugfix)
  • if you don't have an issue_id change it to the pr id after creating the pr
  • ensure type is one of the following:
    • .feature: Signifying a new feature.
    • .bugfix: Signifying a bug fix.
    • .doc: Signifying a documentation improvement.
    • .removal: Signifying a deprecation or removal of public API.
    • .misc: A ticket has been closed, but it is not of interest to users.
  • Make sure to use full sentences with correct case and punctuation, for example: "Fix issue with non-ascii contents in doctest text files."

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d548b59) 97.37% compared to head (95fc567) 97.37%.

Additional details and impacted files

@@           Coverage Diff           @@
##              3.9    #7934   +/-   ##
=======================================
  Coverage   97.37%   97.37%           
=======================================
  Files         108      108           
  Lines       32453    32453           
  Branches     3846     3846           
=======================================
  Hits        31600    31600           
  Misses        652      652           
  Partials      201      201           

Flag	Coverage Δ
CI-GHA	97.28% <ø> (ø)
OS-Linux	96.97% <ø> (ø)
OS-Windows	94.46% <ø> (ø)
OS-macOS	96.78% <ø> (ø)
Py-3.10.11	94.36% <ø> (ø)
Py-3.10.13	96.74% <ø> (ø)
Py-3.11.6	96.50% <ø> (ø)
Py-3.12.0	96.41% <ø> (?)
Py-3.8.10	94.34% <ø> (ø)
Py-3.8.18	96.68% <ø> (ø)
Py-3.9.13	94.35% <ø> (ø)
Py-3.9.18	96.73% <ø> (ø)
Py-pypy7.3.13	96.18% <ø> (ø)
VM-macos	96.78% <ø> (ø)
VM-ubuntu	96.97% <ø> (ø)
VM-windows	94.46% <ø> (ø)

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