Add a NEWS item

Author: yutannihilation

NEWS.md

@@ -1,3 +1,11 @@
+# ggplot2 (development version)
+
+* `fortify()` for sp objects (e.g., `SpatialPolygonsDataFrame`) is now deprecated
+  and will be removed soon in support of [the upcoming retirement of rproj, rgeos,
+  and maptools](https://r-spatial.org/r/2023/05/15/evolution4.html). In advance
+  of the whole removal, `fortify(<SpatialPolygonsDataFrame>, region = ...)`
+  no longer works as of this version (@yutannihilation, #5244).
+
 # ggplot2 3.4.3
 
 This hotfix release addresses a version comparison change in r-devel. There are