[feat/Q] Only runing for the latest release

thanks for using krew-release-bot if you are having issue generating correct template for your plugin, please try using https://rajatjindal.com/tools/krew-release-bot-helper if you are having some other trouble or the above link does not help, please feel free to open the issue According to the following release order: 1.10.3 08/27 make it to latest release 1.10.4 08/28 1.9.6 08/29 Expected effect: update-krew-index only submits PR for `1.10.3` and `1.10.4` and ignores the old version `1.9.6`, now, it's open a PR for all Is the concept of version control under the responsibility of krew-release-bot? Because I think this is a problem that all krew plugins will face.