chore(deps): update actions/setup-python action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-python	action	major	v5 -> v6

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Release Notes

actions/setup-python (actions/setup-python)

v6

Compare Source

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Configuration

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🚦 Automerge: Enabled.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.79%. Comparing base (71a4f33) to head (b461da1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #967   +/-   ##
=======================================
  Coverage   99.79%   99.79%           
=======================================
  Files          10       10           
  Lines         968      968           
=======================================
  Hits          966      966           
  Misses          2        2           

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