good first issueneeds discussion :speech_balloon:workflow :nail_care:
Description
The number of # used for subheadings changes. Compare:
https://github.com/mapbox/mapbox-gl-js/blob/254674eecba53a275a77599fdac8908f9900c350/CHANGELOG.md#-bug-fixes-1
https://github.com/mapbox/mapbox-gl-js/blob/254674eecba53a275a77599fdac8908f9900c350/CHANGELOG.md#-bug-fixes-5
### is better?
Should we add a test for this?