Add NEWS bullet

Author: teunbrand

NEWS.md

@@ -1,5 +1,7 @@
 # ggplot2 (development version)
 
+* Fixed misbehaviour of `draw_key_boxplot()` and `draw_key_crossbar()` with 
+  skewed key aspect ratio (@teunbrand, #5082).
 * Fixed spurious warning when `weight` aesthetic was used in `stat_smooth()` 
   (@teunbrand based on @clauswilke's suggestion, #5053).
 * The `lwd` alias now correctly replaced by `linewidth` instead of `size`