Fix formatting in custom_resource.md by adding a newline at the end of the file to ensure proper rendering and adherence to markdown standards.

Author: eliranb

docs/custom_resource.md

@@ -59,4 +59,5 @@ stringData:
   # Server certificate hash. It is ensuring that agent is connected to the right Lightrun server
   pinned_cert_hash: <pinned_cert_hash>
 kind: Secret
-type: Opaque
+type: Opaque
+```