package/libxml2: security bump to version 2.11.7

Fix CVE-2024-25062: An issue was discovered in libxml2 before 2.11.7 and
2.12.x before 2.12.5. When using the XML Reader interface with DTD
validation and XInclude expansion enabled, processing crafted XML
documents can lead to an xmlValidatePopElement use-after-free.

https://gitlab.gnome.org/GNOME/libxml2/-/blob/v2.11.7/NEWS

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libxml2/libxml2.hash

@@ -1,4 +1,4 @@
-# From https://download.gnome.org/sources/libxml2/2.11/libxml2-2.11.6.sha256sum
-sha256  c90eee7506764abbe07bb616b82da452529609815aefef423d66ef080eb0c300  libxml2-2.11.6.tar.xz
+# From https://download.gnome.org/sources/libxml2/2.11/libxml2-2.11.7.sha256sum
+sha256  fb27720e25eaf457f94fd3d7189bcf2626c6dccf4201553bc8874d50e3560162  libxml2-2.11.7.tar.xz
 # License files, locally calculated
 sha256  c5c63674f8a83c4d2e385d96d1c670a03cb871ba2927755467017317878574bd  Copyright

package/libxml2/libxml2.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 LIBXML2_VERSION_MAJOR = 2.11
-LIBXML2_VERSION = $(LIBXML2_VERSION_MAJOR).6
+LIBXML2_VERSION = $(LIBXML2_VERSION_MAJOR).7
 LIBXML2_SOURCE = libxml2-$(LIBXML2_VERSION).tar.xz
 LIBXML2_SITE = \
 	https://download.gnome.org/sources/libxml2/$(LIBXML2_VERSION_MAJOR)