build(deps): bump pip-tools from 7.5.0 to 7.5.1 in /book/src

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 7.5.0 to 7.5.1.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/main/CHANGELOG.md)
- [Commits](jazzband/pip-tools@v7.5.0...v7.5.1)

---
updated-dependencies:
- dependency-name: pip-tools
  dependency-version: 7.5.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

book/src/requirements.txt

@@ -7,7 +7,7 @@ MutPy==0.6.1
 mypy==1.18.2
 mypy-extensions==1.1.0
 pinject==0.14.1
-pip-tools==7.5.0
+pip-tools==7.5.1
 pyflakes==3.2.0
 pylint==3.3.8
 pytest==8.4.2