Bump pip from 26.2 to 26.2.1

[dependabot]

Bumps pip from 26.2 to 26.2.1.

Changelog

Sourced from pip's changelog.

26.2.1 (2026-08-04)

Bug Fixes

• Reallow keyring installed in a (non-activated) virtual environment to be be used via the import provider method while installing build dependencies. ([#14227](https://github.com/pypa/pip/issues/14227) <https://github.com/pypa/pip/issues/14227>_)

Commits

• 634a6ec Bump for release
• ae2eb4f Revert build dependency installer isolation for legacy build environment (#14...
• 6236392 Merge pull request #14213 from pypa/release/26.2
• da4b2cc Bump for development
• See full diff in compare view

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.99%. Comparing base (b084084) to head (bd5c348).
⚠️ Report is 7 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13375   +/-   ##
=======================================
  Coverage   98.99%   98.99%           
=======================================
  Files         132      132           
  Lines       49290    49290           
  Branches     2566     2566           
=======================================
  Hits        48795    48795           
  Misses        371      371           
  Partials      124      124           

Flag	Coverage Δ
Autobahn	22.06% <ø> (ø)
CI-GHA	98.90% <ø> (ø)
OS-Linux	98.68% <ø> (ø)
OS-Windows	97.03% <ø> (ø)
OS-macOS	97.93% <ø> (-0.01%)	⬇️
Py-3.10	98.13% <ø> (+<0.01%)	⬆️
Py-3.11	98.38% <ø> (-0.01%)	⬇️
Py-3.12	98.47% <ø> (ø)
Py-3.13	98.45% <ø> (-0.01%)	⬇️
Py-3.14	98.46% <ø> (-0.01%)	⬇️
Py-3.14t	97.56% <ø> (ø)
Py-pypy-3.11	97.42% <ø> (+0.01%)	⬆️
VM-macos	97.93% <ø> (-0.01%)	⬇️
VM-ubuntu	98.68% <ø> (ø)
VM-windows	97.03% <ø> (ø)
cython-coverage	38.13% <ø> (ø)

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[codspeed-hq]

Merging this PR will not alter performance

✅ 84 untouched benchmarks
⏩ 83 skipped benchmarks¹

---

_{Comparing dependabot/pip/pip-26.2.1 (bd5c348) with master (b084084)²}

Footnotes

1. 83 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on master (7b72a42) during the generation of this report, so b084084 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩