chore: updated changelog

Author: ntamas

CHANGELOG.md

@@ -6,10 +6,16 @@
 
 - Added `Graph.__invalidate_cache()` for debugging and benchmarking purposes.
 
+### Changed
+
+- The C core of igraph was updated to version 0.10.8.
+
 ### Fixed
 
 - Removed incorrectly added `loops=...` argument of `Graph.is_bigraphical()`.
 
+- Fixed a bug in the Matplotlib graph drawing backend that filled the interior of undirected curved edges.
+
 ## [0.11.2] - 2023-10-12
 
 ### Fixed