Fix typo in role name in documentation

Author: renaaliu

articles/ai-services/language-service/custom-named-entity-recognition/includes/use-pre-existing-resource.md

@@ -51,7 +51,7 @@ Make sure to enable **Custom text classification / Custom Named Entity Recogniti
 5. Select **Apply**.
 
 >[!Important]
-> Make sure that the user making changes has **storage blob data contributor role** assigned for them.
+> Make sure that the user making changes has **storage blob data contributor** role assigned for them.
 
 ### Add required roles