Bump pip from 25.3 to 26.0 (#64)

Bumps [pip](https://github.com/pypa/pip) from 25.3 to 26.0.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@25.3...26.0)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '26.0'
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -46,7 +46,7 @@ nbsphinx==0.9.5
 nodeenv==1.10.0
 packaging==25.0
 pandocfilters==1.5.0
-pip==25.3
+pip==26.0
 platformdirs==4.5.1
 pre_commit==4.5.1
 pycparser==2.22