Remove symlink between main and master attributes

Author: lcawl

shared/attributes.asciidoc

@@ -468,11 +468,11 @@ Legacy definitions
 :apm-get-started-ref:  https://www.elastic.co/guide/en/apm/get-started/{branch}
 :apm-server-ref:       https://www.elastic.co/guide/en/apm/server/{branch}
 :apm-server-ref-v:     https://www.elastic.co/guide/en/apm/server/{branch}
-:apm-server-ref-m:     https://www.elastic.co/guide/en/apm/server/master
+:apm-server-ref-m:     https://www.elastic.co/guide/en/apm/server/main
 :apm-server-ref-62:    https://www.elastic.co/guide/en/apm/server/6.2
 :apm-server-ref-64:    https://www.elastic.co/guide/en/apm/server/6.4
 :apm-server-ref-70:    https://www.elastic.co/guide/en/apm/server/7.0
 :apm-overview-ref-v:   https://www.elastic.co/guide/en/apm/get-started/{branch}
 :apm-overview-ref-70:  https://www.elastic.co/guide/en/apm/get-started/7.0
-:apm-overview-ref-m:   https://www.elastic.co/guide/en/apm/get-started/master
+:apm-overview-ref-m:   https://www.elastic.co/guide/en/apm/get-started/main
 :infra-guide:          https://www.elastic.co/guide/en/infrastructure/guide/{branch}

shared/versions/stack/main.asciidoc

@@ -0,0 +1,57 @@
+:version:                8.5.0
+////
+bare_version never includes -alpha or -beta
+////
+:bare_version:           8.5.0
+:logstash_version:       8.5.0
+:elasticsearch_version:  8.5.0
+:kibana_version:         8.5.0
+:apm_server_version:     8.5.0
+:branch:                 main
+:minor-version:          8.5
+:major-version:          8.x
+:prev-major-version:     7.x
+:prev-major-last:        7.17
+:major-version-only:     8
+:ecs_version:            8.5
+
+//////////
+release-state can be: released | prerelease | unreleased
+//////////
+:release-state:          unreleased
+
+//////////
+is-current-version can be: true | false
+//////////
+:is-current-version:    false
+
+//////////
+hide-xpack-tags defaults to "false" (they are shown unless set to "true")
+//////////
+:hide-xpack-tags:       true
+
+////
+APM Agent versions
+////
+:apm-go-branch:         2.x
+:apm-ios-branch:        0.x
+:apm-java-branch:       1.x
+:apm-rum-branch:        5.x
+:apm-node-branch:       3.x
+:apm-php-branch:        1.x
+:apm-py-branch:         6.x
+:apm-ruby-branch:       4.x
+:apm-dotnet-branch:     1.12
+
+////
+ECS Logging
+////
+:ecs-logging:           main
+:ecs-logging-go-logrus: main
+:ecs-logging-go-zap:    main
+:ecs-logging-java:      1.x
+:ecs-logging-dotnet:    main
+:ecs-logging-nodejs:    main
+:ecs-logging-php:       main
+:ecs-logging-python:    main
+:ecs-logging-ruby:      main