Fix broken link in Postman README

Link in Postman README was not pointed to the correct location. Changed
to the correct location.

Signed-off-by: J.R. Garcia <jrg@vmware.com>

samples/postman/README.md

@@ -3,7 +3,7 @@
 These three files provide API resources and example end to end scenarios that you
 can import in to Postman to execute.
 
-* [vSphere-Automation-Rest-Resources.postman_collection.json](vSphere-Automation-Rest-Resources.postman_collection.json) provides the
+* [vSphere-Automation-REST-Resources.postman_collection.json](vSphere-Automation-REST-Resources.postman_collection.json) provides the
 individual API resources. They are standalone requests that you can execute or use to build up an end to end workflow.
 * The [vSphere-Automation-Rest-API-Samples.postman.json](vSphere-Automation-Rest-API-Samples.postman.json) do
 exactly that to show some common simple use cases.
@@ -66,4 +66,4 @@ To work with the VMware Cloud on AWS Samples follow these steps:
 3. From the VMC Console click your name at the top right of the console window, click "OAuth Refresh Token", from this page, generate or copy your refresh token.
 4. Edit the "VMC Environment" in Postman and set the refresh_token value to the previously copied item.
 5. Use the samples starting with Authentication - Login action.
-* The Org and SDDC will be automatically stored as environmental variables for future API calls once the samples are run, see the Tests tab for how this is done on each call.
+* The Org and SDDC will be automatically stored as environmental variables for future API calls once the samples are run, see the Tests tab for how this is done on each call.