changes: Add changes file for #40282

Closes #40282

Signed-off-by: David Goulet <dgoulet@torproject.org>

changes/ticket40282

+  o Major feature (relay):
+    - Relay do not use nor advertise a DirPort anymore. Only authorities do
+      because it is still used by them. Closes ticket 40282.
+    - Authority DirPort self reachability test has now been removed because
+      network reentry to that DirPort is not allowed anymore.
+