Update website/docs/docs/build/about-metricflow.md

Co-authored-by: Bianca Luna <[email protected]>

Author: nataliefiann

website/docs/docs/build/about-metricflow.md

@@ -94,7 +94,7 @@ MetricFlow supports different metric types:
 
 <VersionBlock lastVersion="1.99">
 
-- [Conversion](/docs/build/conversion): Tracks when a base event and a subsequent conversion event occurs for an entity within a set time period
+- [Conversion](/docs/build/conversion): Tracks when a base event and a subsequent conversion event occurs for an entity within a set time period.
 - [Cumulative](/docs/build/cumulative): Aggregates a <VersionBlock lastVersion="1.99">measure</VersionBlock><VersionBlock firstVersion="2.0">simple metric</VersionBlock> over a given window.
 - [Derived](/docs/build/derived): Defines a metric as an expression of other metrics, which allows you to do calculations on top of metrics.
 - [Ratio](/docs/build/ratio): Defines a metric as the ratio of two measures, such as revenue per customer.