tools/coreutils: fix wrong PKG_HASH after update to version 9.6

tools/coreutils: fix wrong PKG_HASH after update to version 9.6

Currently macOS builds are failing due to hash mismatch. Lets fix it by
using proper hash:

 Here are the SHA1 and SHA256 checksums:

   File: coreutils-9.6.tar.gz
   SHA1 sum:   1da82e96486e0eedbd5257c8190f2cf9fcb71c2e
   SHA256 sum: 2bec616375002c92c1ed5ead32a092b174fe44c14bc736d32e5961053b821d84

References: https://lists.gnu.org/archive/html/coreutils/2025-01/msg00049.html
Fixes: 160e0b7ad866 ("tools/coreutils: update to 9.6")
Reported-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>