fix(docs): api docs for bulk env update response (#7714)

openapi.yaml

@@ -1915,9 +1915,9 @@ paths:
           content:
             application/json:
               schema:
-                properties:
-                  message: { type: string, example: 'Environment variables updated.' }
-                type: object
+                type: array
+                items:
+                  $ref: '#/components/schemas/EnvironmentVariable'
         '401':
           $ref: '#/components/responses/401'
         '400':