Move ML Extension example under "CRD overview" (#1588)

Co-authored-by: Adam Janikowski <12255597+ajanikow@users.noreply.github.com>

Author: nikita-vanyasin

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [master](https://github.com/arangodb/kube-arangodb/tree/master) (N/A)
 - (Feature) Extract GRPC Server
 - (Feature) Extract Integration Service
+- (Documentation) Move ML Extension example under "CRD overview"
 
 ## [1.2.37](https://github.com/arangodb/kube-arangodb/tree/1.2.37) (2024-01-22)
 - (Documentation) Improve documentation rendering for GitHub Pages

docs/mlextension-resource.md

@@ -1,3 +1,9 @@
+---
+layout: page
+parent: Custom resources overview
+title: ArangoMLExtension
+---
+
 # ArangoMLExtension Custom Resource