pip: bump edk2-pytool-extensions from 0.26.3 to 0.26.4 (#228)

Bumps
[edk2-pytool-extensions](https://github.com/tianocore/edk2-pytool-extensions)
from 0.26.3 to 0.26.4.

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

pip-requirements.txt

@@ -1,20 +1,20 @@
-## @file
-# EDK II Python PIP requirements file
-#
-# This file provides the list of python components to install using PIP.
-#
-# Copyright (c) Microsoft Corporation.
-# SPDX-License-Identifier: BSD-2-Clause-Patent
-#
-# https://pypi.org/project/pip/
-# https://pip.pypa.io/en/stable/user_guide/#requirements-files
-# https://pip.pypa.io/en/stable/reference/pip_install/#requirements-file-format
-# https://www.python.org/dev/peps/pep-0440/#version-specifiers
-##
-
+## @file
+# EDK II Python PIP requirements file
+#
+# This file provides the list of python components to install using PIP.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+# https://pypi.org/project/pip/
+# https://pip.pypa.io/en/stable/user_guide/#requirements-files
+# https://pip.pypa.io/en/stable/reference/pip_install/#requirements-file-format
+# https://www.python.org/dev/peps/pep-0440/#version-specifiers
+##
+
 edk2-pytool-library==0.19.8
-edk2-pytool-extensions==0.26.3
-edk2-basetools==0.1.49
-antlr4-python3-runtime==4.13.1
-regex
+edk2-pytool-extensions==0.26.4
+edk2-basetools==0.1.49
+antlr4-python3-runtime==4.13.1
+regex
 pygount==1.6.1