Mention patch #841977: modulefinder didn't find extension modules in packages

Backported to release-maint23
diff --git a/Misc/NEWS b/Misc/NEWS
index 17e7098..14a70f1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -112,6 +112,8 @@
 Library
 -------
 
+- Patch #841977: modulefinder didn't find extension modules in packages
+
 - imaplib.IMAP4.thread was added.
 
 - Plugged a minor hole in tempfile.mktemp() due to the use of