Update README to suggest stable version

Author: weavejester

README.md

@@ -39,11 +39,11 @@ more in-depth documentation on how to use Ring.
 To include one of the above libraries, for instance `ring-core`, add
 the following dependency to your `deps.edn` file:
 
-    ring/ring-core {:mvn/version "1.15.0-beta1"}
+    ring/ring-core {:mvn/version "1.14.2"}
 
 Or to your Leiningen project file:
 
-    [ring/ring-core "1.15.0-beta1"]
+    [ring/ring-core "1.14.2"]
 
 ## Documentation