package/samba4: bump version to 4.20.4

Release notes:
https://www.samba.org/samba/history/samba-4.20.4.html

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit b5fe7088e842aaaed1730f2d50d60e514e052105)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/samba4/samba4.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-# https://download.samba.org/pub/samba/stable/samba-4.20.3.tar.asc
-sha256  afd5a9bb03e5c921c4c1d4e4b4fa6ea16cf798d94e5e5bffb9fd61716641cf30  samba-4.20.3.tar.gz
+# https://download.samba.org/pub/samba/stable/samba-4.20.4.tar.asc
+sha256  3a92e97eaeb345b6b32232f503e14d34f03a7aa64c451fe8c258a11bbda908e5  samba-4.20.4.tar.gz
 sha256  8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/samba4/samba4.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SAMBA4_VERSION = 4.20.3
+SAMBA4_VERSION = 4.20.4
 SAMBA4_SITE = https://download.samba.org/pub/samba/stable
 SAMBA4_SOURCE = samba-$(SAMBA4_VERSION).tar.gz
 SAMBA4_INSTALL_STAGING = YES