Fixed the redirection for "upgrade" articles

Author: javiereguiluz

_build/redirection_map

@@ -227,8 +227,8 @@
 /cookbook/testing/profiling /testing/profiling
 /cookbook/testing/simulating_authentication /testing/simulating_authentication
 /cookbook/upgrade/bundles /upgrade/patch_version
-/cookbook/upgrade/major_version /upgrade/minor_version
-/cookbook/upgrade/minor_version /upgrade/major_version
+/cookbook/upgrade/major_version /setup/upgrade_minor
+/cookbook/upgrade/minor_version /setup/upgrade_major
 /cookbook/upgrade/patch_version /upgrade/bundles
 /cookbook/validation/custom_constraint /validation/custom_constraint
 /cookbook/validation/group_service_resolver /validation/group_service_resolver