Update troubleshooting.md

Fix typo

Author: andywcoder

articles/role-based-access-control/troubleshooting.md

@@ -250,7 +250,7 @@ At line:1 char:1
 If you get this error message, make sure you also specify the `-Scope` or `-ResourceGroupName` parameters.
 
 ```
-PS C:\> Remove-AzRoleAssignment -ObjectId 33333333-3333-3333-3333-333333333333 -RoleDefinitionName "Storage Blob Data Contributor" - Scope /subscriptions/11111111-1111-1111-1111-111111111111
+PS C:\> Remove-AzRoleAssignment -ObjectId 33333333-3333-3333-3333-333333333333 -RoleDefinitionName "Storage Blob Data Contributor" -Scope /subscriptions/11111111-1111-1111-1111-111111111111
 ```
 
 ### Symptom - Cannot delete the last Owner role assignment