Updated RELEASE_NOTES.

RELEASE_NOTES.md

@@ -10,6 +10,8 @@ Fixed crash in a special case of malformed query.
 
 Mastodon API: some tweaks for better integration with more clients, and fixed a crash when processing boosts from kbin.
 
+Fixed crash in the FastCGI code (thanks to Yonle for helping me debug this).
+
 ## 2.43
 
 Tags in posts are now indexed and searching by tag is possible. It's still not very useful, but at least new user posts contain links that return real search-by-tag results. Also, no "re-indexing" of the previously stored data is done (only new local and remote posts will be searchable by tag).