Update JSON.net to 12.0.1 release

Author: SQL-MisterMagoo

BlazorSolidLogin/BlazorSolidLogin.csproj

@@ -38,7 +38,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Blazor.Browser" Version="0.7.0" />
     <PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="0.7.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1-beta1" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
     <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.2.0-preview3-35497" />
   </ItemGroup>