Bump pip from 26.1.2 to 26.2

Bumps [pip](https://github.com/pypa/pip) from 26.1.2 to 26.2.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@26.1.2...26.2)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '26.2'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-initial.txt

@@ -1,5 +1,5 @@
 # requirements-initial.txt
 # From https://dist.plone.org/release/6.2.1/constraints.txt
-pip==26.1.2
+pip==26.2
 setuptools==81.0.0
 wheel==0.47.0