build(deps): bump pip from 26.1.1 to 26.1.2

Bumps [pip](https://github.com/pypa/pip) from 26.1.1 to 26.1.2.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@26.1.1...26.1.2)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: 26.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@
 # Always use a fixed version, this is important for correct hashing.
 # Dependabot will keep these versions up to date.
 
-pip == 26.1.1          # pip is the package installer for Python
+pip == 26.1.2          # pip is the package installer for Python
 setuptools == 82.0.1   # for building Python packages
 pyelftools == 0.33     # for building U-Boot
 unidiff == 0.7.5       # for parsing unified diff