Mentioned packaging-related changes in the changelog

docs/nginx.xml

diff --git a/docs/nginx.xml b/docs/nginx.xml
index b53389e..037dfc0 100644
--- a/docs/nginx.xml
+++ b/docs/nginx.xml
@@ -14,6 +14,24 @@
 </para>
 </change>
 
+<change>
+<para>
+Changed the default number of worker processes to auto
+</para>
+</change>
+
+<change>
+<para>
+Changed the default error log level to notice
+</para>
+</change>
+
+<change>
+<para>
+Dropped charset-related data from packages and default configuration
+</para>
+</change>
+
 </changes>