(conan-io#23512) dbus: security, bump expat

* dbus: security, bump expat

expat<2.6.2 has known vulnerabilites, bump to 2.6.2

* use version range for expat

recipes/dbus/1.x.x/conanfile.py

@@ -80,7 +80,7 @@ def layout(self):
         basic_layout(self, src_folder="src")
 
     def requirements(self):
-        self.requires("expat/2.6.0")
+        self.requires("expat/[>=2.6.2 <3]")
         if self.options.get_safe("with_systemd"):
             self.requires("libsystemd/253.6")
         if self.options.get_safe("with_selinux"):