docs(readme): update README resolving references link (#359)

The default values referenced by the readme appear to have moved
This commit updates the link to reference the new page.
As both links reference the same page, this commit consolidates both.

README.md

@@ -235,7 +235,7 @@ Any unsupported intrinsic functions will return `nil`.
 
 #### Resolving References (Ref)
 
-When converting a YAML/JSON template to go, the intrinsic 'Ref' function as implemented will resolve all of the [pseudo parameters](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-ref.html) such as `AWS::AccountId` with their default value as listed on [the bottom of this page](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-ref.html).
+When converting a YAML/JSON template to go, the intrinsic 'Ref' function as implemented will resolve all of the [pseudo parameters](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/pseudo-parameter-reference.html) such as `AWS::AccountId` with their default value as listed on the page.
 
 If a reference is not a pseudo parameter, GoFormation will try to resolve it within the AWS CloudFormation template. **Currently, this implementation only searches for `Parameters` with a name that matches the ref, and returns the `Default` if it has one.**