docs: improve clarity in "Verify your signer is registered" section

Author: dlachaume

docs/website/root/manual/getting-started/run-signer-node.md

@@ -909,7 +909,7 @@ Once this delay has passed, you should be able to observe your `PoolId` listed i
 
 ### Verify your signer is registered
 
-After installing the Mithril signer, you can verify that your node is registered by checking your Mithril signer node logs.
+After installing the Mithril signer, you can verify that your node is registered by checking your Mithril signer node logs or by running the following script.
 
 First, download the script into the desired directory: