update readme for the winml python example (#503)

Author: chemwolf6922

Samples/WindowsML/python/SqueezeNetPython/readme.md

@@ -21,4 +21,8 @@ extendedZipContent:
 * Install dependencies
 ```PowerShell
 pip install -r requirements.txt
-```
+```
+Please also install the provided wheel files. As those are not published to a public source.
+* Install WindowsAppRuntime
+
+Please install the correct WindowsAppRuntime with the provided installer.

Samples/WindowsML/python/SqueezeNetPython/requirements.txt

@@ -1,11 +1,5 @@
---index-url https://aiinfra.pkgs.visualstudio.com/PublicPackages/_packaging/ORT-Nightly/pypi/simple
---extra-index-url https://pypi.org/simple
-
 pillow
 numpy
-onnxruntime-winml==1.22.0.post2
 winrt-runtime~=3.2.1.0
 winrt-Windows.Foundation~=3.2.1.0
 winrt-Windows.Foundation.Collections~=3.2.1.0
-winui3-Microsoft.Windows.AI.MachineLearning==1!1.8.250702007.dev4
-winui3-Microsoft.Windows.ApplicationModel.DynamicDependency.Bootstrap==1!1.8.250702007.dev4