fix compiler warning re. IDE0005

DepotDownloader/DepotDownloader.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net8.0</TargetFramework>
@@ -9,6 +9,7 @@
     <Authors>SteamRE Team</Authors>
     <Copyright>Copyright © SteamRE Team 2021</Copyright>
     <ApplicationIcon>..\Icon\DepotDownloader.ico</ApplicationIcon>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
 
   <ItemGroup>