Update package references and model paths for the [Phi-3CookBook/tree/main/md/07.Labs/Csharp] samples

[elbruno]

Purpose

Update package references and model paths for the [Phi-3CookBook/tree/main/md/07.Labs/Csharp] samples.
Updated Microsoft ML Onnx Runtime and related libraries to newer versions, ensuring compatibility. Modified model paths for Phi-3 and Phi-3.5 in comments and code. Corrected image loading syntax and updated model initialization to use a new Config class. Overall, these changes enhance clarity and maintainability.

Does this introduce a breaking change?

When developers merge from main and run the server, azd up, or azd deploy, will this produce an error?
If you're not sure, try it out on an old environment.

[ ] Yes
[X] No

Does this require changes to learn.microsoft.com docs?

This repository is referenced by (https://azure.microsoft.com/products/phi-3)
which includes deployment, settings and usage instructions.

[ ] Yes
[X] No

Type of change

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[X] Documentation content changes
[X] Other... Please describe: upgrade packages

[leestott]

@kinfey updates made to samples..
@elbruno thanks for the fix