DOCSP-30493 indexOfArray Quick Win (#3441)

* DOCSP-30493 indexOfArray Quick Win

* remove from high-level entries

* consistency

* JP feedback

Author: ajhuh-mdb

source/includes/extracts-agg-operators.yaml

@@ -190,8 +190,8 @@ content: |
       * - :expression:`$indexOfArray`
 
         - Searches an array for an occurrence of a specified value and
-          returns the array index of the first occurrence. If the
-          substring is not found, returns ``-1``.
+          returns the array index of the first occurrence. Array indexes start
+          at zero.
 
       * - :expression:`$isArray`
 

source/reference/operator/aggregation.txt

@@ -613,8 +613,7 @@ Alphabetical Listing of Expression Operators
    * - :expression:`$indexOfArray`
 
      - Searches an array for an occurrence of a specified value and returns
-       the array index of the first occurrence. If the substring is not found,
-       returns ``-1``.
+       the array index of the first occurrence. Array indexes start at zero.
 
 
    * - :expression:`$indexOfBytes`

source/reference/operator/aggregation/indexOfArray.txt

@@ -16,8 +16,7 @@ Definition
 .. expression:: $indexOfArray
 
    Searches an array for an occurrence of a specified value and returns
-   the array index (zero-based) of the first occurrence. If the
-   value is not found, returns ``-1``.
+   the array index of the first occurrence. Array indexes start at zero.
 
    :expression:`$indexOfArray` has the following :ref:`operator
    expression syntax <agg-quick-ref-operator-expressions>`: