entry to index

Author: rustagir

source/aggregation/agg-exp-ops.txt renamed to source/agg-exp-ops.txt

@@ -19,6 +19,7 @@
    /read
    /indexes
    /aggregation
+   /agg-exp-ops
    /data-formats
    /faq
    /connection-troubleshooting
@@ -85,6 +86,9 @@ Transform Your Data with Aggregation
 Learn how to use the {+driver-short+} to perform aggregation operations in the
 :ref:`kotlin-sync-aggregation` section.
 
+Learn how to use aggregation expression operations to build
+aggregation stages in the :ref:`kotlin-sync-aggregation-expression-operations` section.
+
 Specialized Data Formats
 ------------------------