Add Tests badge to README.md

Author: DimmKirr

README.md

@@ -1,4 +1,5 @@
 # Terraform AWS SSM Parameters Module
+[![Tests](https://github.com/automationd/atun/actions/workflows/tests.yml/badge.svg)](https://github.com/AutomationD/atun/actions/workflows/tests.yml)
 
 The main goal of the module is to provide a consistent way to manage service SSM parameters. Suitable for use with [External Secrets](https://external-secrets.io/latest/).
 
@@ -71,4 +72,4 @@ No modules.
 | Name | Description |
 |------|-------------|
 | <a name="output_ssm_parameter_paths"></a> [ssm\_parameter\_paths](#output\_ssm\_parameter\_paths) | A list of paths to created parameters |
-<!-- END_TF_DOCS -->
+<!-- END_TF_DOCS -->