package/mbedtls: security bump to version 2.28.8

- Use official tar.bz2 tarball
- Fix CVE-2024-28960

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2024-03.md
https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.8

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/mbedtls/mbedtls.hash

@@ -1,4 +1,4 @@
-# From https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.7:
-sha256  1df6073f0cf6a4e1953890bf5e0de2a8c7e6be50d6d6c69fa9fefcb1d14e981a  mbedtls-2.28.7.tar.gz
+# From https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.8:
+sha256  241c68402cef653e586be3ce28d57da24598eb0df13fcdea9d99bfce58717132  mbedtls-2.28.8.tar.bz2
 # Locally calculated
 sha256  9b405ef4c89342f5eae1dd828882f931747f71001cfba7d114801039b52ad09b  LICENSE

package/mbedtls/mbedtls.mk

@@ -4,8 +4,9 @@
 #
 ################################################################################
 
-MBEDTLS_VERSION = 2.28.7
-MBEDTLS_SITE = $(call github,ARMmbed,mbedtls,v$(MBEDTLS_VERSION))
+MBEDTLS_VERSION = 2.28.8
+MBEDTLS_SITE = https://github.com/Mbed-TLS/mbedtls/releases/download/v$(MBEDTLS_VERSION)
+MBEDTLS_SOURCE = mbedtls-$(MBEDTLS_VERSION).tar.bz2
 MBEDTLS_CONF_OPTS = \
 	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) -std=c99" \
 	-DENABLE_PROGRAMS=$(if $(BR2_PACKAGE_MBEDTLS_PROGRAMS),ON,OFF) \