Update schema to display placeholder correctly

Martha Cryan · Martha Cryan · commit 59818da8885a · 2022-06-28T16:29:30.000-05:00
diff --git a/elyra/metadata/schemas/url-catalog.json b/elyra/metadata/schemas/url-catalog.json
@@ -64,7 +64,9 @@
           },
           "uihints": {
             "category": "Configuration",
-            "ui:placeholder": "https://host:port/path/component_file"
+            "items": {
+              "ui:placeholder": "https://host:port/path/component_file"
+            }
           }
         },
         "auth_id": {
