Typo set-up-ad.md (#965)

"adsysctl" was misspelled

docs/how-to/set-up-ad.md

@@ -19,7 +19,7 @@ To get them, run `adsysctl policy admx lts-only`. It will create 2 files `Ubuntu
 
 Those are the 2 files that must be copied on your Active Directory server.
 
-You can find the latest version of those files in a [dedicated directory of the upstream repository](https://github.com/ubuntu/adsys/tree/main/policies). Note though that not all the keys may be supported by our local `ADSys` installation. Only the templates generated by `adysctl` match the version of your client.
+You can find the latest version of those files in a [dedicated directory of the upstream repository](https://github.com/ubuntu/adsys/tree/main/policies). Note though that not all the keys may be supported by our local `ADSys` installation. Only the templates generated by `adsysctl` match the version of your client.
 
 The policy files are also shipped as part of the `adsys-windows` package, together with the [Active Directory Watch Daemon](../reference/adwatchd.md).