Update next.md

Author: sylvestre

next.md

@@ -29,8 +29,9 @@ This file documents the pending improvements or regression:
 * https://github.com/uutils/coreutils/pull/6861
 * https://github.com/uutils/coreutils/pull/6885
 * https://github.com/uutils/coreutils/pull/5788
-* https://github.com/uutils/coreutils/pull/6621/
+* https://github.com/uutils/coreutils/pull/6621
 * https://github.com/uutils/coreutils/pull/6907
 * https://github.com/uutils/coreutils/pull/6906
 * https://github.com/uutils/coreutils/pull/6933
 * https://github.com/uutils/coreutils/pull/6966
+* https://github.com/uutils/coreutils/pull/6971