Update index.md

Signed-off-by: sergiomarotco <29877074+sergiomarotco@users.noreply.github.com>

Author: sergiomarotco

collections/made-in-russia/index.md

@@ -3,6 +3,7 @@ items:
 - https://github.com/ClickHouse/ClickHouse
 - https://github.com/catboost/catboost
 - https://github.com/nginx
+- https://github.com/sergiomarotco/Network-segmentation-cheat-sheet
 - https://github.com/theKashey/awesome-made-by-russians
 
 display_name: Made in Russia