Remove extra line break from remarks (#4016)

`WindowsServiceLifetimeHostBuilderExtensions` documentation contains an extra line break which is causing incorrect formatting on the generated HTML.

Author: irontoby

xml/Microsoft.Extensions.Hosting/WindowsServiceLifetimeHostBuilderExtensions.xml

@@ -43,8 +43,7 @@
         <summary>Sets the host lifetime to WindowsServiceLifetime, sets the Content Root,
             and enables logging to the event log with the application name as the default source name.</summary>
         <returns>The same instance of the <see cref="T:Microsoft.Extensions.Hosting.IHostBuilder" /> for chaining.</returns>
-        <remarks>This is context aware and will only activate if it detects the process is running
-            as a Windows Service.</remarks>
+        <remarks>This is context aware and will only activate if it detects the process is running as a Windows Service.</remarks>
       </Docs>
     </Member>
   </Members>