bpo-40458: Increase reserved stack space to prevent overflow crash on Windows (GH-19845)

diff --git a/PCbuild/pythonw_uwp.vcxproj b/PCbuild/pythonw_uwp.vcxproj
index 828d0d1..e21e46a 100644
--- a/PCbuild/pythonw_uwp.vcxproj
+++ b/PCbuild/pythonw_uwp.vcxproj
@@ -95,6 +95,7 @@
     <Link>
       <AdditionalDependencies>windowsapp.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <SubSystem>Windows</SubSystem>
+      <StackReserveSize>2000000</StackReserveSize>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="$(Configuration) != 'Debug'">