The changelog entries should be directly used for the release notes,
thus they need to be short and hold only information relevant to the
end user, and should be in the markdown bullet point format.
If we use date format of DD-MM-YYYY in changelog file names, the files
will not sorted by date. e.g. 01-12-2021 will come before 25-11-2021.
Use date format of YYYY-MM-DD to make the files sorted by date.
