Fixed the link for Credentials Profile to point to the CLI credential…

… file settings article, rather than the PHP SDK article (#2479)

SUMMARY
Fixed the link for Credentials Profile authentication documentation to point to the AWS CLI credential file settings article, rather than the PHP SDK article
ISSUE TYPE

Docs Pull Request

ADDITIONAL INFORMATION
It looks like maybe Amazon updated their documentation, as the old URL (https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials_profiles.html) now automatically redirects to https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/welcome.html, which is their PHP SDK documentation. I updated the URL to a more accurate set of documentation for CLI configuration/Credentials Profiles. https://docs.aws.amazon.com/cli/v1/userguide/cli-configure-files.html

Reviewed-by: Mark Chappell
Reviewed-by: Alina Buzachis
Reviewed-by: Mandar Kulkarni <[email protected]>
(cherry picked from commit 390fbcc)

docs/docsite/rst/guide_aws.rst

@@ -66,7 +66,7 @@ Or they can be specified using "module_defaults" at the top of a playbook.::
             key_name: "example-ssh-key"
             image_id: "..."
 
-Credentials can also be accessed from a `Credentials Profile <https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials_profiles.html>`_.::
+Credentials can also be accessed from a `Credentials Profile <https://docs.aws.amazon.com/cli/v1/userguide/cli-configure-files.html>`_.::
 
     - amazon.aws.ec2_instance:
         aws_profile: default