Update from the Amazon platform to the Amazon Linux 2 platform

Based on the versions listed for the Amazon platform at
https://galaxy.ansible.com/api/v1/platforms/?name=Amazon we cannot use
"2" as a platform. However per the ansible/galaxy#2068 issue I changed
the platform to "Amazon Linux 2" with a version of "any".

Author: mcdonnnj

meta/main.yml

@@ -14,9 +14,9 @@ galaxy_info:
   min_ansible_version: "2.10"
   namespace: cisagov
   platforms:
-    - name: Amazon
+    - name: Amazon Linux 2
       versions:
-        - "2"
+        - any
     - name: Debian
       versions:
         - stretch