README: Add Communication section with Forum information (#142)

README.md

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 The `microsoft.ad` collection includes the plugins supported by Ansible to help the management of Microsoft Active Directory.
 
+## Communication
+
+* Join the Ansible forum:
+  * [Get Help](https://forum.ansible.com/c/help/6): get help or help others.
+  * [Posts tagged with 'microsoft-ad'](https://forum.ansible.com/tag/microsoft-ad): subscribe to participate in collection-related conversations.
+  * [Social Spaces](https://forum.ansible.com/c/chat/4): gather and interact with fellow enthusiasts.
+  * [News & Announcements](https://forum.ansible.com/c/news/5): track project-wide announcements including social events.
+
+* The Ansible [Bullhorn newsletter](https://docs.ansible.com/ansible/devel/community/communication.html#the-bullhorn): used to announce releases and important changes.
+
+For more information about communication, see the [Ansible communication guide](https://docs.ansible.com/ansible/devel/community/communication.html).
+
 ## Ansible version compatibility
 
 This collection has been tested against following Ansible versions: **>=2.15**.

changelogs/fragments/0-readme.yml

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+---
+trivial:
+  - README.md - Add Communication section with Forum information.