Put changes entry in the correct position.

docs/changes.xml

@@ -31,6 +31,12 @@ NGINX Unit updated to 1.28.0.
          date="" time=""
          packager="Nginx Packaging <nginx-packaging@f5.com>">
 
+<change type="change">
+<para>
+increased the applications' startup timeout.
+</para>
+</change>
+
 <change type="feature">
 <para>
 supporting UNIX sockets in address matching.
@@ -75,12 +81,6 @@ handled, and caused a use-after-free bug.
 </para>
 </change>
 
-<change type="change">
-<para>
-increased the applications' startup timeout.
-</para>
-</change>
-
 <change type="bugfix">
 <para>
 force SCRIPT_NAME in Ruby to always be an empty string.