pip prod(deps): update pip requirement from >=9.0.1 to >=26.1

Updates the requirements on [pip](https://github.com/pypa/pip) to permit the latest version.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@9.0.1...26.1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-pip>=9.0.1
+pip>=26.1
 numpy>=1.26,<=2.4.3
 sympy>=1.12.1,<1.15
 psutil>=7.2.2,<8.0