Update NEWS.md with info on PR #24

NEWS.md

@@ -5,7 +5,8 @@ Due to a bugfix in `statnet.common` 4.2.0, `ggnetwork` now requires R ≥ 3.5 (#
 
 ## Minor improvements and fixes
 
-Finished fixing a bug affecting 2-node, 1-tie networks of class `igraph` (#12). Thanks to [Mickaël Canouil](https://github.com/mcanouil) (#20) and [Zachary Charlop-Powers](https://github.com/zachcp) (#24).
+* Finished fixing a bug affecting 2-node, 1-tie networks of class `igraph` (#12). Thanks to [Mickaël Canouil](https://github.com/mcanouil) (#20) and [Zachary Charlop-Powers](https://github.com/zachcp) (#24).
+
 * Added a `stringsAsFactors` argument that allows to import vertex and edge 
 attributes as character strings instead of factors, which remains the default 
 behaviour (#53).