Bump pip from 24.2 to 25.3 in /requirements

Bumps [pip](https://github.com/pypa/pip) from 24.2 to 25.3.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@24.2...25.3)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '25.3'
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements/pip-tools.txt

@@ -20,7 +20,7 @@ wheel==0.44.0
     # via pip-tools
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==24.2
+pip==25.3
     # via pip-tools
 setuptools==78.1.1
     # via pip-tools