Update LDM agenda

meetings/2023/README.md

@@ -11,6 +11,16 @@ All schedule items must have a public issue or checked-in proposal that can be l
 - *Triage championed features and milestones*
 - *Design review*
 
+## Mon Dec 18, 2023
+
+## Wed Dec 13, 2023
+
+## Mon Dec 4, 2023
+
+## Wed Nov 29, 2023
+
+## Wed Nov 15, 2023
+
 ## Wed Oct 18, 2023
 
 ## Mon Oct 16, 2023