Update NuGet package versions in Blazor project (#365)

Bumped versions for Microsoft.AspNetCore.Components.WebAssembly, DevServer, and System.Net.Http.Json to address latest updates.

Author: gfs

OAT.Blazor/OAT.Blazor.csproj

@@ -10,10 +10,10 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.17" />
-		<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.17" PrivateAssets="all" />
+		<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.18" />
+		<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.18" PrivateAssets="all" />
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-		<PackageReference Include="System.Net.Http.Json" Version="9.0.6" />
+		<PackageReference Include="System.Net.Http.Json" Version="9.0.7" />
 	</ItemGroup>
 
 	<ItemGroup>