package/expat: security update to 2.7.0

Fixes CVE-2024-8176.

For more details, see:
https://blog.hartwork.org/posts/expat-2-7-0-released/

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit dcd6bea6aeee09a533974d30c578b990c2ecdede)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/expat/expat.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  a695629dae047055b37d50a0ff4776d1d45d0a4c842cf4ccee158441f55ff7ee  expat-2.6.4.tar.xz
+sha256  25df13dd2819e85fb27a1ce0431772b7047d72af81ae78dc26b4c6e0805f48d1  expat-2.7.0.tar.xz
 sha256  122f2c27000472a201d337b9b31f7eb2b52d091b02857061a8880371612d9534  COPYING

package/expat/expat.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-EXPAT_VERSION = 2.6.4
+EXPAT_VERSION = 2.7.0
 EXPAT_SITE = https://github.com/libexpat/libexpat/releases/download/R_$(subst .,_,$(EXPAT_VERSION))
 EXPAT_SOURCE = expat-$(EXPAT_VERSION).tar.xz
 EXPAT_INSTALL_STAGING = YES