Fix current glossary branch

Author: lcawl

conf.yaml

@@ -203,7 +203,7 @@ contents:
                 map_branches: *mapMasterToMain
           - title:      Glossary
             prefix:     en/elastic-stack-glossary
-            current:    master
+            current:    main
             index:      docs/en/glossary/index.asciidoc
             branches:   [ {main: master}, main ]
             tags:       Elastic Stack/Glossary