Fix position of entry in changelog
that should be represented either by an `enum`, or by sequence of `enum`s
(`Vec`, tuple, etc.), or by string. Use it when you want to map field to any
content of the field, text or markup
-- [#521]: MSRV bumped to 1.52.
Refer to [documentation] for details.
+- [#521]: MSRV bumped to 1.52.
[#490]: https://github.com/tafia/quick-xml/pull/490
[#500]: https://github.com/tafia/quick-xml/issues/500
