Changed mentions of trial to free tier

Author: Rebecca-Martinez007

modules/hello-world/pages/start-using-sdk.adoc

@@ -59,7 +59,7 @@ include::example$start-using.js[tags=**]
 --
 ====
 
-The Couchbase Capella free trial version comes with the Travel Sample Bucket, and its Query indexes, loaded and ready.
+The Couchbase Capella free tier version comes with the Travel Sample Bucket, and its Query indexes, loaded and ready.
 
 == Quick Installation