Update dependency Newtonsoft.Json to v13.0.3

Author: renovate[bot]

src/ElectricityMap.DotNet.Client/ElectricityMap.DotNet.Client.csproj

@@ -21,7 +21,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="5.0.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="System.Collections" Version="4.3.0" />
   </ItemGroup>