Update readme and changelog

Author: marcelmamula

CHANGELOG.rst

@@ -15,6 +15,7 @@ Enhancements to Modules and introduction of new Ansible Role.
 Minor Changes
 -------------
 - sap_software_download: New Ansible Role with enhanced logic for downloading software using Ansible Module software_center_download (https://github.com/sap-linuxlab/community.sap_launchpad/pull/32)
+- sap_software_download: Download stack XML option (https://github.com/sap-linuxlab/community.sap_launchpad/pull/35)
 - software_center_download: Add option to search for latest packages (https://github.com/sap-linuxlab/community.sap_launchpad/pull/28)
 - maintenance_planner modules: Add option to use Display ID instead of name (https://github.com/sap-linuxlab/community.sap_launchpad/pull/31)
 - Collection Readme update and preparation for 1.2.0 release (https://github.com/sap-linuxlab/community.sap_launchpad/pull/34)

README.md

@@ -12,6 +12,8 @@ Included role and modules cover range of options:
 - Download of alternative SAP Software files if specific was not available. 
 - Download of SAP Software files from existing Maintenance Plan transaction.
 - Download of Stack file from existing Maintenance Plan transaction.
+- Register Systems and License Keys
+- Query registered Systems
 
 
 ## Requirements