fix(ui): Create DBLab instance page: Update 4.0 beta.0 tag to beta.7

Author: Bogdan Tsechoev

ui/packages/platform/src/components/DbLabInstanceForm/utils/index.tsx

@@ -8,7 +8,7 @@ import { useCloudProviderProps } from 'hooks/useCloudProvider'
 const API_SERVER = process.env.REACT_APP_API_SERVER
 export const DEBUG_API_SERVER = 'https://v2.postgres.ai/api/general'
 
-export const availableTags = ['3.5.0', '3.4.0', '4.0.0-beta.0']
+export const availableTags = ['3.5.0', '3.4.0', '4.0.0-beta.7']
 
 export const sePackageTag = 'v1.4'