pip: bump edk2-pytool-library to 0.23.13, regex to 2026.4.4 (#867)

Bumps the all-pip-dependencies group with 2 updates:
[edk2-pytool-library](https://github.com/tianocore/edk2-pytool-library)
and [regex](https://github.com/mrabarnett/mrab-regex).

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

@@ -12,8 +12,8 @@
 # https://www.python.org/dev/peps/pep-0440/#version-specifiers
 ##
 
-edk2-pytool-library==0.23.12
+edk2-pytool-library==0.23.13
 edk2-pytool-extensions==0.31.0
 antlr4-python3-runtime==4.13.2
-regex==2026.3.32
+regex==2026.4.4
 pygount==3.1.1