Fix double nesting in get list of keys

Author: vdusek

apify-api/openapi/components/schemas/key-value-stores/GetListOfKeysResponse.yaml

@@ -4,4 +4,4 @@ required:
 type: object
 properties:
   data:
-    $ref: ./ListOfKeysResponse.yaml
+    $ref: ./ListOfKeys.yaml

apify-api/openapi/components/schemas/key-value-stores/ListOfKeys.yaml

@@ -0,0 +1,44 @@
+title: ListOfKeys
+type: object
+required:
+  - items
+  - count
+  - limit
+  - isTruncated
+properties:
+  items:
+    type: array
+    items:
+      type: object
+      title: Item
+      required:
+        - key
+        - size
+        - recordPublicUrl
+      properties:
+        key:
+          type: string
+          example: second-key
+        size:
+          type: number
+          example: 36
+        recordPublicUrl:
+          type: string
+          description: "A public link to access this record directly."
+          example: 'https://api.apify.com/v2/key-value-stores/WkzbQMuFYuamGv3YF/records/some-key?signature=abc123'
+    description: ''
+  count:
+    type: number
+    example: 2
+  limit:
+    type: number
+    example: 2
+  exclusiveStartKey:
+    type: string
+    example: some-key
+  isTruncated:
+    type: boolean
+    example: true
+  nextExclusiveStartKey:
+    type: string
+    example: third-key