Fix typo in divide.txt

Author: Karsten7

source/reference/operator/aggregation/divide.txt

@@ -28,7 +28,7 @@ Definition
    divisor; i.e. the first argument is divided by the second argument.
 
    The arguments can be any valid :ref:`expression
-   <aggregation-expressions>` as long as the resolve to numbers. For
+   <aggregation-expressions>` as long as they resolve to numbers. For
    more information on expressions, see :ref:`aggregation-expressions`.
 
 Examples