test(deps): update dependency pip-tools to v7.5.1 (main)

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This PR contains the following updates:

Package	Change	Age	Confidence
pip-tools (changelog)	7.5.0 -> 7.5.1

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Release Notes

jazzband/pip-tools (pip-tools)

v7.5.1

Compare Source

2025-09-26

Bug fixes

• Fixed static parsing of {file}pyproject.toml data when the
  {file}pyproject.toml is supplied as a relative path -- by {user}sirosen.

  PRs and issues: {issue}2215, {issue}2221, {issue}2233

• The "via" paths in pip-compile output for requirements discovered from
  pyproject.toml data are now written in POSIX format -- by {user}sirosen.

  PRs and issues: {issue}2221

• Fixed a bug which removed slashes from URLs in -r and -c in the output
  of pip-compile -- by {user}sirosen.

  PRs and issues: {issue}2223

• Fixed an incompatibility with click >= 8.3 which made pip-compile display incorrect
  options in the compile command in output headers -- by {user}sirosen.

  PRs and issues: {issue}2235

Features

• pip-tools now officially supports pip version 25.2 -- by {user}sirosen.

  PRs and issues: {issue}2214

Improved documentation

• ReadTheDocs builds for pip-tools no longer include htmlzip and pdf outputs -- by {user}sirosen.

  PRs and issues: {issue}2218

Contributor-facing changes

• pip-tools now tests on pip version 25.2 -- by {user}sirosen.

  PRs and issues: {issue}2214

• The changelog documentation for contributors now provides hyperlinks to the source of each example change note -- by {user}jayaddison (for OpenCulinary).

  PRs and issues: {issue}2217

• The CPython versions tested in nightly CI runs are now separate from
  branch and PR CI, and don't include very old versions -- by {user}sirosen.

  PRs and issues: {issue}2226

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