docs: add communication section with forum information (#549)

##### SUMMARY

As a part of the [Consolidating Ansible discussion platforms
initiative](https://forum.ansible.com/t/proposal-consolidating-ansible-discussion-platforms/6812),
this PR adds the communication section template defined by the community
to the README. Similar PRs are being raised across all included
collections under the ansible-collection org for now.

- If you have your forum group and/or tags related to the collection,
please update corresponding lines by suggesting changes to the PR.
- If the collection is not present on the Ansible forum yet, please
check out the existing [tags](https://forum.ansible.com/tags) and
[groups](https://forum.ansible.com/g) - use what suits your collection.
If there is no appropriate tag, please [request
one](https://forum.ansible.com/t/requesting-a-forum-group/503/17). You
can also request a group there as a WG if needed. Then update
corresponding lines by suggesting changes to the PR.
- Presence in the forum will soon likely become a part of the Collection
inclusion requirements.

##### ISSUE TYPE

- Docs Pull Request

##### COMPONENT NAME
README.md

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: jo <[email protected]>

README.md

@@ -7,7 +7,20 @@
 
 Ansible Hetzner Cloud Collection for controlling your Hetzner Cloud Resources.
 
-### Python version compatibility
+## Communication
+
+- Join the Ansible forum:
+
+  - [Get Help](https://forum.ansible.com/c/help/6): get help or help others.
+  - [Posts tagged with 'hcloud'](https://forum.ansible.com/tag/hcloud): 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).
+
+## Python version compatibility
 
 This collection depends on the [hcloud](https://github.com/hetznercloud/hcloud-python) library. Due to the [hcloud](https://github.com/hetznercloud/hcloud-python) Python Support Policy this collection requires Python 3.8 or greater.