pip: bump pywin32 from 311 to 312

Updates `pywin32` from 311 to 312

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

Author: dependabot[bot]

pip-requirements.txt

@@ -16,4 +16,4 @@ edk2-pytool-library==0.23.13
 edk2-pytool-extensions==0.31.0
 xmlschema==4.3.1
 regex==2026.5.9
-pywin32==311; sys_platform == 'win32'
+pywin32==312; sys_platform == 'win32'