Fix references

Signed-off-by: Sebastian Golebiewski <sebastianx.golebiewski@intel.com>

Author: sgolebiewski-intel

metro-ai-suite/metro-vision-ai-app-recipe/smart-tolling/docs/user-guide/how-it-works.md

@@ -65,9 +65,9 @@ The application can be configured to work with live cameras.
 :::{toctree}
 :hidden:
 
-./perception-layer
-./optimization
-./analytics-pipeline
+./how-it-works/perception-layer
+./how-it-works/optimization
+./how-it-works/analytics-pipeline
 
 :::
 hide_directive-->