Update install-software.md

Author: jahjha

articles/center-sap-solutions/install-software.md

@@ -122,13 +122,13 @@ You can download the SAP installation media required to install the SAP software
     git clone https://github.com/Azure/sap-automation.git
     ```
 
-1. Change the branch to experimental
+1. Change the branch to main
 
     ```git bash
-    git checkout experimental
+    git checkout main
     ```
 
-1. [Optional] : Verify if the current branch is "experimental"
+1. [Optional] : Verify if the current branch is "main"
 
 
     ```git bash