Fix MSB4109 (#25880)

Fix MSB4109 error when the Microsoft.Extensions.ApiDescription.Server NuGet package is installed.

Author: martincostello

src/Tools/Extensions.ApiDescription.Server/src/build/Microsoft.Extensions.ApiDescription.Server.targets

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <_IsMicrosoftNETCoreApp20OrOlder>false</_IsMicrosoftNETCoreApp20OrOlder>
     <_IsMicrosoftNETCoreApp20OrOlder Condition=" '$(TargetFrameworkIdentifier)' == '.NETCoreApp' AND
-      $([MSBuild]::VersionLessThanOrEquals('$(TargetFrameworkVersion)', '2.0') ">true</_IsMicrosoftNETCoreApp20OrOlder>
+      $([MSBuild]::VersionLessThanOrEquals('$(TargetFrameworkVersion)', '2.0')) ">true</_IsMicrosoftNETCoreApp20OrOlder>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(OpenApiGenerateDocuments)' == '' ">
     <OpenApiGenerateDocuments>true</OpenApiGenerateDocuments>