Update pre-aggregations.md

Author: paveltiunov

docs/Schema/pre-aggregations.md

@@ -325,7 +325,7 @@ cube(`Orders`, {
 
 As in case of cube pre-aggregations `refreshKey` can define `every` parameter which can be used to refresh pre-aggregations based on time interval.
 
-> **NOTE:** `every` parameter doesn't force Cube.js to fetch `refreshKey` based on it's interval. It generates SQL which result set change at least once per defined interval and adjusts `refreshKeyRenewalThreshold` accordingly.
+> **NOTE:** `every` parameter doesn't force Cube.js to fetch `refreshKey` based on it's interval. It generates SQL which result set change at least once per defined interval and adjusts `refreshKeyRenewalThreshold` accordingly. [Learn more](cube#parameters-refresh-key).
 
 For example: