dep: update libxml2 to v2.12.7

Author: flavorjones

CHANGELOG.md

@@ -4,6 +4,18 @@ Nokogiri follows [Semantic Versioning](https://semver.org/), please see the [REA
 
 ---
 
+## next
+
+### Security
+
+* [CRuby] Vendored libxml2 is updated to address CVE-2024-34459. See [GHSA-r95h-9x8f-r3f7](https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-r95h-9x8f-r3f7) for more information.
+
+
+### Dependencies
+
+* [CRuby] Vendored libxml2 is updated to [v2.12.7](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.12.7) from v2.12.6. (@flavorjones)
+
+
 ## v1.16.4 / 2024-04-10
 
 ### Dependencies

dependencies.yml

@@ -1,8 +1,8 @@
 ---
 libxml2:
-  version: "2.12.6"
-  sha256: "889c593a881a3db5fdd96cc9318c87df34eb648edfc458272ad46fd607353fbb"
-  # sha-256 hash provided in https://download.gnome.org/sources/libxml2/2.12/libxml2-2.12.6.sha256sum
+  version: "2.12.7"
+  sha256: "24ae78ff1363a973e6d8beba941a7945da2ac056e19b53956aeb6927fd6cfb56"
+  # sha-256 hash provided in https://download.gnome.org/sources/libxml2/2.12/libxml2-2.12.7.sha256sum
 
 libxslt:
   version: "1.1.39"