Prepare 0.21.2 release

Author: alessfg

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.21.2 (Unreleased)
+## 0.21.2 (October 7, 2021)
 
 ENHANCEMENTS:
 

README.md

@@ -14,7 +14,7 @@ This role installs NGINX Open Source, NGINX Plus, or the NGINX Amplify agent on
 
 ### Ansible
 
-* This role is developed and tested with [maintained](https://docs.ansible.com/ansible/devel/reference_appendices/release_and_maintenance.html) versions of Ansible core (above `2.11`) and Ansible (above `2.9.10`).
+* This role is developed and tested with [maintained](https://docs.ansible.com/ansible/devel/reference_appendices/release_and_maintenance.html) versions of Ansible core (above `2.11`).
 * When using Ansible base, you will also need to install the following collections:
 
     ```yaml