addr: Rename last_resolved_addr to be v4 specific

Part of #33233

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

src/core/mainloop/connection.c

@@ -4870,7 +4870,7 @@ client_check_address_changed(tor_socket_t sock)
     smartlist_clear(outgoing_addrs);
     smartlist_add(outgoing_addrs, tor_memdup(&out_addr, sizeof(tor_addr_t)));
     /* We'll need to resolve ourselves again. */
-    reset_last_resolved_addr();
+    reset_last_resolved_addr_v4();
     /* Okay, now change our keys. */
     ip_address_changed(1);
   }