bip155: add changelog

bip-0155.mediawiki

@@ -193,6 +193,13 @@ Cjdns addresses are simply IPv6 addresses in the <code>fc00::/8</code> range<ref
 
 Yggdrasil addresses are simply IPv6 addresses in the <code>0200::/7</code> range<ref>[https://yggdrasil-network.github.io/faq.html#will-yggdrasil-conflict-with-my-network-routing Yggdrasil FAQ]</ref>. They MUST be sent with the <code>YGGDRASIL</code> network ID.
 
+== Changelog ==
+
+* 2.0.0 (2025-10-01):
+** Add note that Tor v2 is no longer operational.
+* 1.0.0 (2019-02-27):
+** Initial version
+
 ==References==
 
 <references/>