mark the binning change as a breaking change

Author: teunbrand

NEWS.md

@@ -25,6 +25,9 @@
   rather than in the layer method of `update_ggplot()` 
   (previously `ggplot_add.Layer()`). This may affect code that accessed the 
   `plot$labels` property (@teunbrand, #5894).
+* In binning stats, the default `boundary` is now chosen to better adhere to
+  the `nbin` argument. This may affect plots that use default binning
+  (@teunbrand, #5882, #5036)
 
 ### Lifecycle changes
 
@@ -218,8 +221,6 @@
   aesthetics (@teunbrand, #2800, #3142, #5740, #3722).
 * All binning stats now use the `boundary`/`center` parametrisation rather
   than `origin`, following in `stat_bin()`'s footsteps (@teunbrand).
-* In `stat_bin()`, the default `boundary` is now chosen to better adhere to
-  the `nbin` argument (@teunbrand, #5882, #5036)
 * Reintroduced `drop` argument to `stat_bin()` (@teunbrand, #3449)
 * `stat_bin()` now accepts functions for argument `breaks` (@aijordan, #4561)
 * `after_stat()` and `after_scale()` throw warnings when the computed aesthetics