fixed broken link

docs/addons/gmaestro.md

@@ -9,7 +9,7 @@ This add-on will deploy gMaestro agent on a namespace of your choice and create
 
 ## Prerequisites
 Before using gMaestro, you need to:
-1. [Sign up](https://app.granulate.io/gMaestroSignup) to the gMaestro platform
+1. [Sign up](https://app.granulate.io/) to the gMaestro platform
 2. Download a config YAML file - After signing up to gMaestro, navigate to the [Deploy](https://app.granulate.io/) on the left-hand menu, fill in the required fields and click on "Generate Config File" as shown bellow:
 
 ![GmaestroGenerateConfigFile](./../assets/images/gmaestro-generate-config-file.png)