update (Azure#16991)

Author: maririos

sdk/formrecognizer/test-resources.json

@@ -44,7 +44,7 @@
         },
         "selectionMarkTrainingDataContainer": {
             "type": "string",
-            "defaultValue": "formselectionmark"
+            "defaultValue": "selectionmark"
         },
         "trainingDataResourceId": {
             "type": "string",