Update version of dotnet to 9.0 on dockerfile

docs/en/Community-Articles/2023-11-16-Upgrading-Your-Existing-Projects-to-NET8/POST.md

@@ -52,7 +52,7 @@ For example, you can update the ASP.NET Core image as follows:
 
 ```diff
 - FROM mcr.microsoft.com/dotnet/aspnet:7.0-bullseye-slim AS base
-+ FROM mcr.microsoft.com/dotnet/aspnet:8.0
++ FROM mcr.microsoft.com/dotnet/aspnet:9.0
 ```
 
 You can check the related images from Docker Hub and update them accordingly:

modules/basic-theme/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo/Dockerfile.azure

@@ -14,7 +14,7 @@ WORKDIR /app/abp/modules/basic-theme/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.D
 RUN abp install-libs
 RUN dotnet publish -c Release -o bin/Release/publish
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0
+FROM mcr.microsoft.com/dotnet/aspnet:9.0
 WORKDIR /app
 EXPOSE 80
 ENV ASPNETCORE_URLS=http://+:80