Update changelog

Author: kimo-k

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 > Committed but unreleased changes are put here, at the top. Older releases are detailed chronologically below. 
 
+## 2.21.15 (2024-07-26)
+
+#### Changed
+
+- `dropdown` - Removed `:line-height` style from the theme. `:line-height` was left-over from old bootstrap css. Bootstrap used it to achieve a semblance of vertical centering of text in the anchor. Since we use a re-com box, we can do vertical centering in a nicer way.
+
+- `dropdown` - More consistent handling of width/height props. `:width` applies to both anchor and body, while `:height` applies only to the body. You can override this behavior for specific parts using `:anchor-width`, `:anchor-height`, `:body-width` and `:body-height`.
+
+`:anchor-height`, `:body-height`, `:anchor-width` & `:body-width` props apply more consistently to their parts.
+
 ## 2.21.14 (2024-07-25)
 
 #### Added