<!--- Please read this! Before opening a new issue, make sure to search for keywords in the issues filtered by the "regression" or "bug" label: - https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=regression - https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=bug and verify the issue you're about to submit isn't a duplicate. ---> ### Summary Tag names don't accept spaces, we should either: - Make this clear to users in the error message - Auto snakeize the tag name like we do with project names (ie "a test tag" -> "a-test-tag") ### Steps to reproduce 1. Navigate to the new tag form: https://staging.gitlab.com/gitlab-org/gitlab/-/tags/new 1. Specify a tag name with spaces 1. Submit ### Relevant logs and/or screenshots