pip: bump regex from 2024.11.6 to 2026.2.28

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2024.11.6 to 2026.2.28.
- [Changelog](https://github.com/mrabarnett/mrab-regex/blob/hg/changelog.txt)
- [Commits](mrabarnett/mrab-regex@2024.11.6...2026.2.28)

---
updated-dependencies:
- dependency-name: regex
  dependency-version: 2026.2.28
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pip-requirements.txt

@@ -16,6 +16,6 @@ edk2-pytool-library~=0.23.4
 edk2-pytool-extensions~=0.29.11
 antlr4-python3-runtime==4.9
 lcov-cobertura==2.1.1
-regex==2024.11.6
+regex==2026.2.28
 pylibfdt==1.7.2.post1
 pefile