Restore :suggestion

Author: JoeRobich

template_feed/Microsoft.DotNet.Common.ItemTemplates/content/EditorConfig/Dotnet/.editorconfig

@@ -109,7 +109,7 @@ csharp_style_conditional_delegate_call = true:suggestion
 # Modifier preferences
 csharp_prefer_static_anonymous_function = true:suggestion
 csharp_prefer_static_local_function = true:warning
-csharp_preferred_modifier_order = public,private,protected,internal,file,const,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,required,volatile,async
+csharp_preferred_modifier_order = public,private,protected,internal,file,const,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,required,volatile,async:suggestion
 csharp_style_prefer_readonly_struct = true:suggestion
 csharp_style_prefer_readonly_struct_member = true:suggestion