Add link to pull request 8606

Author: sylvestre

next.md

@@ -75,3 +75,4 @@ This file documents the pending improvements or regression:
 * https://github.com/uutils/coreutils/pull/8296
 * https://github.com/uutils/coreutils/pull/8338
 * https://github.com/uutils/coreutils/pull/8517
+* https://github.com/uutils/coreutils/pull/8606