readme.md in aws_recon-0.5.20 vs readme.md in aws_recon-0.5.21

@@ -35,9 +35,10 @@
 - [Bugcrowd](https://www.bugcrowd.com/)
 - [Dropbox](https://www.dropbox.com/)
 - [Pinterest](https://www.pinterest.com/)
 - [HackerOne](https://www.hackerone.com/)
 - [MuleSoft](https://www.mulesoft.com/)
+- [Slack](https://slack.com/)
 - [Drata](https://drata.com/)
 
 > ** usage does not imply endorsement
 
 ## Setup