Bump Microsoft.Windows.CsWin32 from 0.3.257 to 0.3.259 (#683)

---
updated-dependencies:
- dependency-name: Microsoft.Windows.CsWin32
  dependency-version: 0.3.259
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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DepotDownloader/DepotDownloader.csproj

@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.257">
+    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.259">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>