Update v1-reference.md

Author: michelle-luna

jekyll/_api/v1-reference.md

@@ -5,7 +5,7 @@ categories: [reference]
 description: Using the CircleCI API
 ---
 
-The CircleCI API is a RESTful, fully-featured API that allows you to access all information and trigger all actions in CircleCI. **Note:** The following limitations: 
+The CircleCI API is a RESTful, fully-featured API that allows you to access all information and trigger all actions in CircleCI. **Note:** The following limitations exist: 
 
 - Access to billing functions is only available from the CircleCI application.
 - Triggering workflows is not yet supported in the API.