Document kind of tag that is created from the UI
What does this MR do?
When creating a tag from the UI without a message, we create a lightweight tag, versus an annotated tag when a message was provided.
https://git-scm.com/book/en/v2/Git-Basics-Tagging
This was brought up in #31318 (comment 226622081)
Screenshots
Does this MR meet the acceptance criteria?
Conformity
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