Bump pip from 26.0 to 26.1 in /dashboard/docker (#15)

Bumps [pip](https://github.com/pypa/pip) from 26.0 to 26.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@26.0...26.1)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '26.1'
  dependency-type: direct:production
...

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Author: dependabot[bot]

dashboard/docker/requirements.txt

@@ -1,4 +1,4 @@
-pip==26.0
+pip==26.1
 numpy==2.0.0
 dash==2.18.2
 plotly==5.24.1