Add PR #1223 to changelog.

Author: tmiw

USER_MANUAL.md

@@ -880,6 +880,7 @@ LDPC | Low Density Parity Check Codes - a family of powerful FEC codes
 1. Bugfixes:
     * Linux: fix semaphore wakeup timing to reduce audio dropouts. (PR #1220)
     * FreeDV Reporter: Fix display issues on non-English systems. (PR #1217)
+    * Update audio device list in Easy Setup after opening advanced audio setup. (PR #1223)
 2. Enhancements:
     * FreeDV Reporter: Use ItemsAdded/ItemsDeleted instead of Cleared() for performance. (PR #1212)
 3. Build system: