docs: add link to slack workspace

Author: svolkov

README.md

@@ -10,7 +10,7 @@ Generated api module use [**Fetch Api**](https://developer.mozilla.org/en-US/doc
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-Any questions you can ask [**here**](https://github.com/acacode/swagger-typescript-api/issues)  
+Any questions you can ask [**here**](https://github.com/acacode/swagger-typescript-api/issues) or in [**our slack**](https://join.slack.com/t/acacode/shared_invite/enQtOTQ5ODgyODQzMzYwLWYxOGI1MzQ3Yzg1ZWI5ZTI5NzNiZjExZTE5OWI1YjQ4NjBiNTk4NWVlNjM5YmU1ZWI2ZDkyMzZkZGIxNjA5NTQ)
 
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