When updating comment, if the content is the same, just return and not update the databse (#34422)#34464

lunny merged 2 commits intogo-gitea:release/v1.24go-gitea/gitea:release/v1.24from

GiteaBot:backport-34422-v1.24GiteaBot/gitea:backport-34422-v1.24Copy head branch name to clipboard