Removed extra </Project> tag from code block (#207)

The code block contained the ending `</Project>` tag which means when you copy & paste the code into your csproj file, you now have to remove the extra tag.

Co-authored-by: Simon (Darkside) Jackson <darkside@zenithmoon.com>

Author: AristurtleDev

articles/getting_started/content_pipeline/content_builder_project.md

@@ -162,7 +162,6 @@ To complete the process, add the following `Target` section to your `csproj` (be
     <MSBuild Projects="..\Content\Content.csproj" Targets="Build;Run"
       Properties="RunArguments=$(ContentArgs);" />
   </Target>
-</Project>
 ```
 
 Of note, you should take care with the following elements: