add news bullet

Author: teunbrand

NEWS.md

@@ -9,6 +9,8 @@
 
 
 * Allow `stat` in `geom_hline`, `geom_vline`, and `geom_abline`. (@sierrajohnson, #6559)
+* `draw_key_polygon()` and `draw_key_timeseries()` now reflect the 
+  `outline.type` parameter (@teunbrand, #6649).
 
 # ggplot2 4.0.0