pip: bump regex from 2026.1.15 to 2026.2.19 (#1330)

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2026.1.15
to 2026.2.19.

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pip-requirements.txt

@@ -15,7 +15,7 @@
 edk2-pytool-library~=0.23.11
 edk2-pytool-extensions~=0.30.6
 xmlschema==4.3.1
-regex==2026.1.15
+regex==2026.2.19
 pygount==3.1.1
 pywin32==311; sys_platform == 'win32'
 setuptools==82.0.0