Update readme

Author: 0xdabbad00

README.md

@@ -146,6 +146,7 @@ python cloudmapper.py collect --account-name my_account
 - `prepare`/`webserver`: See [Network Visualizations](docs/network_visualizations.md)
 - `stats`: Show counts of resources for accounts. More details [here](https://summitroute.com/blog/2018/06/06/cloudmapper_stats/).
 - `sg_ips`: Get geoip info on CIDRs trusted in Security Groups. More details [here](https://summitroute.com/blog/2018/06/12/cloudmapper_sg_ips/).
+- `find_admins`: Look at IAM policies to identify admin users and roles and spot potential IAM issues. More details [here](https://summitroute.com/blog/2018/06/12/cloudmapper_find_admins/).
 
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