chore: updated C core

ntamas · ntamas · commit df2ed3f5b10d · 2023-11-17T13:31:40.000+01:00
diff --git a/vendor/source/igraph b/vendor/source/igraph
@@ -1 +1 @@
-Subproject commit a8862c42db657f52ad4b800f9f70941ccb1aee3b
+Subproject commit 4e04d39438ac03bf177529e754a07b05beb0930b
