update readme for 2.3.0 schema (#222)

Signed-off-by: Jordan Dubrick <[email protected]>

Author: Jdubrick

README.md

@@ -11,7 +11,7 @@
 ## About
 
 The Devfile Parser library is a Golang module that:
-1. parses a devfile as specified by the [api](https://devfile.io/docs/2.2.2/devfile-schema) & [schema](https://github.com/devfile/api/tree/main/schemas/latest).
+1. parses a devfile as specified by the [api](https://devfile.io/docs/2.3.0/devfile-schema) & [schema](https://github.com/devfile/api/tree/main/schemas/latest).
 2. writes to the specified devfile with the updated data.
 3. generates Kubernetes objects for the various devfile resources.
 4. defines util functions for the devfile.