mention 19429 in changes file

changes/feature19429

@@ -1,5 +1,5 @@
   o Minor features (compatibility):
     - Tor now detects versions of OpenSSL 1.1.0 and later compiled with the
       no-deprecated option, and builds correctly with them. Closes
-      tickets 19981 and 25353.
+      tickets 19429, 19981, and 25353.