add link to ggbreak

NEWS.md

@@ -16,14 +16,16 @@ ggrepel 0.9.5
 
 ## Changes
 
-- Introduce a new function `exclude_outside()` into `geom_text_repel()` and `geom_label_repel()` to discard labels outside the panel range, in order to support the [ggbreaks] package. See [issue 244] for details.
+- Introduce a new function `exclude_outside()` into `geom_text_repel()` and `geom_label_repel()` to discard labels outside the panel range, in order to support the [ggbreak] package. See [issue 244] for details.
 
 - Change `expect_equal()` to include a tolerance, to satisfy CRAN testing.
 
 - Delete note about old (before 2.2.1) versions of ggplot2, thanks to @olivroy for [pull request 246].
 
 - Add website link to `DESCRIPTION`, thanks to @olivroy for [pull request 241].
 
+[ggbreak]: https://github.com/YuLab-SMU/ggbreak
+
 [issue 244]: https://github.com/slowkow/ggrepel/issues/244
 
 [pull request 241]: https://github.com/slowkow/ggrepel/pull/241