More detailed description for CHANGELOG section

CONTRIBUTING.md

@@ -1,13 +1,23 @@
 # Contributing
 
-### Add an entry to the changelog
+Thank you for considering to contribute to `bat`!
 
-Please don't forget to update [CHANGELOG.md](CHANGELOG.md) and describe your changes (in the "unreleased" section), this makes the release of a new `bat` version much easier.
 
-Each entry should follow the following format:
+
+## Add an entry to the changelog
+
+If your contribution changes the behavior of `bat` (as opposed to a typo-fix
+in the documentation), please update the [`CHANGELOG.md`](CHANGELOG.md) file
+and describe your changes. This makes the release proess much easier and
+therefore helps to get your changes into a new `bat` release faster.
+
+The top of the `CHANGELOG` contains a *"unreleased"* section with a few
+subsections (Features, Bugfixes, …). Please add your entry to the subsection
+that best describes your change
+
+Entries follow this format:
 ```
 - Short description of what has been changed, see #123 (@user)
 ```
-
-Where `#123` is your PR's number or ticket and `@user` is you Github's username. 
-
+Here, `#123` is the number of the original issue and/or your pull request.
+Please replace `@user` by your GitHub username.

README.md

@@ -678,7 +678,7 @@ cargo install --path . --locked --force
 
 ## Contributing
 
-Take a look to this [guide](CONTRIBUTING.md)
+Take a look at the [`CONTRIBUTING.md`](CONTRIBUTING.md) guide.
 
 ## Maintainers