fix: ChartPoints & description in responses

Author: mois-ilya

api/openapi.yml

@@ -94,6 +94,7 @@ paths:
         - Utilities
       responses:
         '200':
+          description: openapi.json
           content:
             application/json:
               schema: { } # Free-form JSON value
@@ -107,6 +108,7 @@ paths:
         - Utilities
       responses:
         '200':
+          description: openapi.yml
           content:
             application/yaml:
               schema:
@@ -7324,14 +7326,15 @@ components:
                 $ref: '#/components/schemas/NftItem'
     ChartPoints:
       type: array
-      items:
+      prefixItems:
         - type: integer
           format: int64
           description: Unix timestamp of the data point
         - type: number
           description: Decimal price of the token in the requested currency
+      items: false
       additionalItems: false
-      example: [ 1668436763, 97.21323234 ]
+      example: [[ 1668436763, 97.21323234 ]]
     AccountInfoByStateInit:
       type: object
       required: