Updated 5.4 contributors list.

CHANGELOG.txt

@@ -23,6 +23,9 @@
 - Fixed //chunk switching from //sel extend to //sel cuboid.
 - Removed chat-based WECUI protocol (now replaced with packet 250).
 
+Thank you for the contributions from Ammar Askar, aumgn, Jim Nordbø, snaxson,
+Socolin, and Zhuowei Zhang.
+
 5.3:
 - Made #region mask keep the region selected when the pask was added, and
     added #dregion mask that always uses the player's current