feat(update-changelog): Add a new section "Chores" for changes that are not...

Add a new section "Chores" for changes that are not related to the code itself (e.g. update dependencies, update docs, etc.)

Motivation: a lot of open source projects use that in their changelog files and it is handy, because changes related to CI, dependencies, docs, tests, etc. currently do not have a good place in changelog.