Fix grammar in concept sentences (pluralization)
@@ -31,10 +31,10 @@ All interactions between Hop and other components in your data architecture are
_Metadata is at the core of **everything** in Hop_.
-* **Pipelines** are a collections of **transforms**, connected by **hops**.
+* **Pipelines** are collections of **transforms**, connected by **hops**.
All transforms in a pipeline run in parallel.
-* **Workflows** are a collection of **actions**, connected by **hops**.
+* **Workflows** are collections of **actions**, connected by **hops**.
All actions in a workflow run sequentially by default.
* **Projects** are logical collections of hop code and configuration.
