Update package name (#16)

Update README to remove private install warning

Author: JoshMock

README.md

@@ -8,15 +8,7 @@ If you're looking to develop your Node.js application with Elastic Enterprise Se
 
 ## Installation
 
-:warning: The package is a prototype!
-It will not be published anywhere publicly until it is in a stable state and ready for Elastic customers to start trying out.
-In the meantime, Elastic emplyoees can install directly from GitHub to try it out:
-
-```shell
-npm install elastic/elasticsearch-serverless-js
-```
-
-When published, package will be available on npm's public registry at `@elastic/elasticsearch-serverless`:
+Install via npm:
 
 ```shell
 npm install @elastic/elasticsearch-serverless