data-factory/create-shared-self-hosted-integration-runtime-powershell.md: Use more readable parameter for role definition

Author: bergmeister

articles/data-factory/create-shared-self-hosted-integration-runtime-powershell.md

@@ -168,7 +168,7 @@ Grant permission to the data factory that needs to access the self-hosted integr
 ```powershell
 New-AzRoleAssignment `
     -ObjectId $factory.Identity.PrincipalId ` #MSI of the Data Factory with which it needs to be shared
-    -RoleDefinitionId 'b24988ac-6180-42a0-ab88-20f7382dd24c' ` #This is the Contributor role
+    -RoleDefinitionName 'Contributor' `
     -Scope $SharedIR.Id
 ```
 
@@ -195,7 +195,7 @@ To revoke the access of a data factory from the shared integration runtime, run
 ```powershell
 Remove-AzRoleAssignment `
     -ObjectId $factory.Identity.PrincipalId `
-    -RoleDefinitionId 'b24988ac-6180-42a0-ab88-20f7382dd24c' `
+    -RoleDefinitionName 'Contributor' `
     -Scope $SharedIR.Id
 ```