Update dependency Discord.Net to v3.13.0

Author: renovate[bot]

AwesomeChatBot.Discord.csproj

@@ -22,7 +22,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Discord.Net" Version="3.9.0" />
+    <PackageReference Include="Discord.Net" Version="3.13.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(Configuration)' == 'Release'">