Add Ansible Template Playground to tools (#100)

* Add Ansible Template Playground to tools

* Add proper dot at end of new entry

Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>

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Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>

Author: ProfessorLogout

README.md

@@ -119,6 +119,7 @@ For more information about communication, see the [Ansible communication guide](
 - [aar-doc - Automated Ansible Role Documentation](https://github.com/telekom-mms/Automated-Ansible-Role-Documentation) - Generate documentation automatically from an Ansible role's metadata.
 - [antsichaut](https://github.com/ansible-community/antsichaut) - Automate the filling of a changelog.yaml used by antsibull-changelog.
 - [ansibledb](https://github.com/nbentoumi/ansibledb) - Flask API Web server that uses MongoDB as database to store Ansible reports and facts; this tool can be used to query hosts and facters managed Ansible as well search Ansible logs.
+- [Ansible Template Playground](https://tech-playground.com/playgrounds/ansible-template/) - Online playground for running, testing and sharing Ansible templates.
 
 ## Blog posts and opinions