bpo-34977: Add Windows App Store package (GH-10245)

diff --git a/PCbuild/python.props b/PCbuild/python.props
index 09f11d3..6dbb503 100644
--- a/PCbuild/python.props
+++ b/PCbuild/python.props
@@ -77,7 +77,8 @@
     -->
     <_RegistryVersion>$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</_RegistryVersion>
     <_RegistryVersion Condition="$(_RegistryVersion) == ''">$(Registry:HKEY_LOCAL_MACHINE\WOW6432Node\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</_RegistryVersion>
-    <DefaultWindowsSDKVersion>10.0.17134.0</DefaultWindowsSDKVersion>
+    <DefaultWindowsSDKVersion>10.0.17763.0</DefaultWindowsSDKVersion>
+    <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.17134'">10.0.17134.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.16299'">10.0.16299.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.15063'">10.0.15063.0</DefaultWindowsSDKVersion>
     <DefaultWindowsSDKVersion Condition="$(_RegistryVersion) == '10.0.14393'">10.0.14393.0</DefaultWindowsSDKVersion>