Why is there no "update:" conventional commit? Should we always use "feat:" when updating?

I am learning the conventional commits. I am curious if we update some feature or a little of code patch, why don’t we use “update:” in the conventional commits?

I have read that there is feat: and fix: keywords for the conventional commits. Anyone knows why there is no “update:” keywords for the conventional commits or we can add them or am I missing something here?

While there’s no officially defined “update:” keyword in Conventional Commits, you can use it informally to describe minor updates or changes that don’t fall strictly under “feat” or “fix”.