Add python-net to build script

Author: vladimir-litvinchik

build_docs.cmd

@@ -4,6 +4,7 @@ call git submodule update --init --recursive
 call git submodule foreach git pull origin master
 xcopy java common\content\%PRODUCT%\java /s /e /Y /i
 xcopy net common\content\%PRODUCT%\net /s /e /Y /i
+xcopy python-net common\content\%PRODUCT%\python-net /s /e /Y /i
 xcopy _index.md common\content\%PRODUCT% 
 cd common
 call hugo server --config config-geekdoc.toml, show-feedback-config.toml