Switch to GenHTTP 3.0.3 (#5642)

* Switch to GenHTTP 3.0.3

* Disable tiered compilation

frameworks/CSharp/genhttp/Benchmarks/Benchmarks.csproj

@@ -14,12 +14,13 @@
     <OutputType>Exe</OutputType>
     
     <ServerGarbageCollection>true</ServerGarbageCollection>
+    <TieredCompilation>false</TieredCompilation>
     
   </PropertyGroup>
     
   <ItemGroup>
-    <PackageReference Include="GenHTTP.Core" Version="3.0.1" />
-    <PackageReference Include="GenHTTP.Modules.Webservices" Version="3.0.1" />
+    <PackageReference Include="GenHTTP.Core" Version="3.0.3" />
+    <PackageReference Include="GenHTTP.Modules.Webservices" Version="3.0.3" />
   </ItemGroup>
   
 </Project>