Update analysis-functions.md

Author: jangdan

docs/use-cases/time-series/03_analysis-functions.md

@@ -61,7 +61,7 @@ LIMIT 10;
 Counter metrics naturally accumulate over time. 
 To analyze this cumulative growth, we can calculate running totals using window functions.
 
-The following query demonstrates this by using the `sum() OVER` clause creates a running total, while the `bar()` function provides a visual representation of the growth. 
+The following query demonstrates this by using the `sum() OVER` clause, which creates a running total. The `bar()` function provides a visual representation of the growth.
 
 ```sql
 SELECT