Added changelog.

Author: 0rnela

.changelog

@@ -4,6 +4,8 @@
 # - Fixed error in Bat section of Upgrade Guide (bsc#1234567)
 # For guidelines: https://en.opensuse.org/openSUSE:Creating_a_changes_file_(RPM)#Changelog_section_.28.25changelog.29
 
+- Added commands to server migration procedures in Installation and
+  Upgrade Guide (bsc#1214569)
 - Added information for proxy migration to Installation and
   Upgrade Guide (bsc#1214568)
 - Added reference to dry run documentation (bsc#1223368)