doc: mention conventional commits

Signed-off-by: William Woodruff <[email protected]>

CONTRIBUTING.md

@@ -5,8 +5,7 @@ Thank you for your interest in contributing to `zizmor`!
 This is intended to be a "high-level" guide with some suggestions
 for ways to contribute. Once you've picked a contribution idea,
 please see our [development docs]
-for concrete guidance on specific development tasks (such as building `zizmor`
-itself or the documentation website).
+for concrete guidance on specific development tasks and style prescriptions.
 
 ## How to contribute
 

docs/development.md

@@ -22,6 +22,11 @@ Here are some guidelines to follow if you're working on `zizmor`:
   behavior.
 * *Test on real inputs*. If you're contributing to or adding a new audit,
   make sure your analysis is reliable and accurate on non-sample inputs.
+* *Use [conventional commits]*. These are not mandatory, but they make
+  it easier to quickly visually scan the contents of a change. Help us
+  out by using them!
+
+[conventional commits]: https://www.conventionalcommits.org/en/v1.0.0/
 
 ## Requirements