Update WebAuthenticator Sample app dependencies (#2116)

* Update WebAuthenticator Sample app to net8

* Revert "Update WebAuthenticator Sample app to net8"

This reverts commit 228ebdd5fe.

* Update WebAuth Sample project dependencies

Samples/Sample.Server.WebAuthenticator/Sample.Server.WebAuthenticator.csproj

@@ -6,6 +6,8 @@
 
   <ItemGroup>
     <PackageReference Include="AspNet.Security.OAuth.Apple" Version="3.1.8" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="5.7.0" />
+    <PackageReference Include="Microsoft.IdentityModel.JsonWebTokens" Version="5.7.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.Facebook" Version="3.1.2" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.Google" Version="3.1.2" />