update doc

Author: sanluan

Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17-jdk
+FROM eclipse-temurin:21-jdk
 ADD publiccms-parent/publiccms/target/publiccms.war /opt/publiccms.war
 ADD data /data
 ENV PORT=8080

README.md

@@ -21,17 +21,17 @@ https://github.com/sanluan/PublicCMS
 
 ## Participate in development
 
-Switch to the V4.0-develop,V5-develop branch and the free version to the V2021 branch
+Switch to the develop branch and the free version to the V2021 branch
 ![](doc/images/commits.jpg)
 
 ## Licensing agreement
 
-* Version :V4.0,V5 Free for individuals and paid for enterprises: See LICENSE for details
+* Version :V4.0,V5,V6 Free for individuals and paid for enterprises: See LICENSE for details
 * Version :V1.0,V2016,V2017,V2019,V2021 Completely free license agreement :MIT
 
 ## Environmental requirements
 
-* V4.0 jdk or jre 1.8 and later,V5 Java17 and later
+* V4.0 jdk or jre 1.8 and later,V5 Java17 and later,V6 Java21 and later
 * mysql 5.5 and later
 
 ## Directory description

README.zh-CN.md

@@ -21,17 +21,17 @@ https://github.com/sanluan/PublicCMS
 
 ## 参与开发
 
-切换到V4.0-develop,V5-develop分支,免费版本切换到V2021分支
+切换到develop分支,免费版本切换到V2021分支
 ![](doc/images/commits.jpg)
 
 ## 授权协议
 
-* 版本:V4.0,V5 个人免费,企事业单位付费 授权协议:详情参见LICENSE
+* 版本:V4.0,V5,V6 个人免费,企事业单位付费 授权协议:详情参见LICENSE
 * 版本:V1.0,V2016,V2017,V2019,V2021 完全免费 授权协议:MIT
 
 ## 环境要求
 
-* V4.0 jdk或jre 1.8 及以上,V5 Java17及以上
+* V4.0 jdk或jre 1.8 及以上,V5 Java17及以上,V6 Java21及以上
 * mysql 5.5 及以上
 
 ## 目录说明