DOCS-13883 Update left nav index

mungitoperrito · jeff-allen-mongo · commit e18406475a01 · 2021-01-14T16:51:00.000-05:00
diff --git a/source/reference/operator/aggregation.txt b/source/reference/operator/aggregation.txt
@@ -1065,6 +1065,7 @@ Alphabetical Listing of Expression Operators
    /reference/operator/aggregation/pow
    /reference/operator/aggregation/push
    /reference/operator/aggregation/radiansToDegrees
+   /reference/operator/aggregation/rand
    /reference/operator/aggregation/range
    /reference/operator/aggregation/reduce
    /reference/operator/aggregation/regexFind
