Add `azd` instructions to eShopLite sample.

[mitchdenny]

@jongio brought this up.

[DamianEdwards]

Should we do this in the dotnet/aspire-samples repo instead?

[jongio]

I'm thinking we add a link from dotnet/aspire to dotnet/aspire-samples repo...right under the deployment / samples section. Right now it points to a subfolder in dotnet/aspire repo.