tools/expat: update to 2.7.5

Changelog:
https://github.com/libexpat/libexpat/blob/R_2_7_5/expat/Changes

Fixes: CVE-2026-32776 CVE-2026-32777 CVE-2026-32778
Link: openwrt/openwrt#23007
Signed-off-by: Nick Hainke <vincent@systemli.org>

Author: PolynomialDivision

tools/expat/Makefile

@@ -9,10 +9,10 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=expat
 PKG_CPE_ID:=cpe:/a:libexpat_project:libexpat
-PKG_VERSION:=2.7.4
+PKG_VERSION:=2.7.5
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_HASH:=461ecc8aa98ab1a68c2db788175665d1a4db640dc05bf0e289b6ea17122144ec
+PKG_HASH:=9931f9860d18e6cf72d183eb8f309bfb96196c00e1d40caa978e95bc9aa978b6
 PKG_SOURCE_URL:=https://github.com/libexpat/libexpat/releases/download/R_$(subst .,_,$(PKG_VERSION))
 
 HOST_BUILD_PARALLEL:=1