Update test-connections.md

Author: stayseesong

src/connections/test-connections.md

@@ -57,6 +57,6 @@ The Event Tester is only accessible to users with write access in their Segment
 
 If you experience an error, [let Segment know](mailto:[email protected]) and the Segment team will help you troubleshoot the issue.
 
-#### Is this feature available for Datalakes?**
+#### Is this feature available for Data Lakes?**
 
-The Event Tester is not available for Datalakes.
+The Event Tester is not available for Data Lakes.