Upgrading.md: Fix Asterisk 22 Upgrading page.

Author: seanbright

docs/Asterisk_22_Documentation/Upgrading.md

@@ -1,4 +1,4 @@
 ---
 title: Upgrading to Asterisk 22
 ---
-For a complete list upgrade information in Asterisk 22 please see the [UPGRADE.txt document](https://raw.githubusercontent.com/asterisk/asterisk/22/UPGRADE.txt) included with Asterisk 22.
+For a complete list upgrade information in Asterisk 22 please see the [ChangeLog-22.0.0.md document](https://raw.githubusercontent.com/asterisk/asterisk/releases/22/ChangeLogs/ChangeLog-22.0.0.md) included with Asterisk 22.