Any changes made to a bot or its underlying actions would only be saved as draft and will not be available as an ability of the bot. To make any changes reflect on the bot, the bot should be published. Hence, in order for the bot to understand the addition of any new actions, removal of existing actions or modifications made in the existing actions, the bot has to be published.
This is necessary to ensure that you can make seamless changes on the go on a bot, that is already being consumed by the users.
To update the bot to its latest version, click the UPDATE button in the bot's detail page.
On successful publish, any changes made in the bot and its underlying actions will be reflected on the bot.
Please note that the UPDATE button will be visible only if there are any changes made in any of the underlying actions that you have written.