Fixed xml docs output folder.

Author: Joel Mitchell

src/Cofoundry.Plugins.ErrorLogging/Cofoundry.Plugins.ErrorLogging.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
-    <DocumentationFile>bin\Release\netcoreapp3.2\Cofoundry.Plugins.ErrorLogging.xml</DocumentationFile>
+    <DocumentationFile>bin\Release\netcoreapp3.1\Cofoundry.Plugins.ErrorLogging.xml</DocumentationFile>
     <NoWarn>1701;1702;1705;1591</NoWarn>
   </PropertyGroup>