Update CHANGES.md

Author: etrepum

CHANGES.md

@@ -1,7 +1,8 @@
-Version 3.0.0 released 2022-XX-XX
+Version 3.0.0 released 2022-05-09
 
 * rebar3 is now the preferred build tool (finally)
   https://github.com/mochi/mochiweb/pull/241
+  https://github.com/mochi/mochiweb/pull/243
 * Minimum OTP version is now 18, which
   allows us to remove a number of backwards
   compatibility hacks while still supporting