Bump dubbo from 2.5.3 to 2.6.9 in /springdemo/springmvc#16

dependabot[bot] wants to merge 1 commit intomasterchenyiming/learn:masterfrom

dependabot/maven/springdemo/springmvc/com.alibaba-dubbo-2.6.9chenyiming/learn:dependabot/maven/springdemo/springmvc/com.alibaba-dubbo-2.6.9Copy head branch name to clipboard