fix typo

Author: sdgilley

articles/machine-learning/how-to-add-users.md

@@ -45,7 +45,7 @@ The following custom roles give other levels of access for a data labeling proje
     1. On the left, select **Access control (IAM)**.
     1. At the top, select **+ Add > Add custom role**.
     1. For the **Custom role name**, type the name you want to use. For example, **Labeling team lead**.
-    1. In the **Description** box, add a description. For example, **Team leader for tlabeling projects**.
+    1. In the **Description** box, add a description. For example, **Team leader for labeling projects**.
     1. Select **Start from JSON**.
     1. Ignore the **Select a file** entry, even though it is starred.  You'll create the JSON in a future step.
     1. At the bottom of the page, select **Next**.