Update next.md

Author: sylvestre

next.md

@@ -73,3 +73,4 @@ This file documents the pending improvements or regression:
 * https://github.com/uutils/coreutils/pull/8265
 * https://github.com/uutils/coreutils/pull/8264
 * https://github.com/uutils/coreutils/pull/8296
+* https://github.com/uutils/coreutils/pull/8338