DOC: reverting project entity for mamonsu installation instructions

Author: Liudmila Mantrova

doc/src/sgml/mamonsu.sgml

@@ -70,8 +70,8 @@
     <para>
       To use <filename>mamonsu</filename>, you must have a <filename>zabbix</filename> account and a <filename>zabbix</filename> server set up.</para>
       <para>A pre-built <filename>mamonsu</filename> package is provided together with 
-      <productname>&project;</productname>, but has a
-      separate installer. Once you have installed both <productname>&project;</productname> and <filename>mamonsu</filename>, complete the following
+      <productname>&productname;</productname>, but has a
+      separate installer. Once you have installed both <productname>&productname;</productname> and <filename>mamonsu</filename>, complete the following
       steps to set up metrics collection:
     </para>
     <orderedlist>