prepare 6.x for docs release

Author: rsill-neo4j

antora.yml

@@ -1,7 +1,6 @@
 name: graphql
 title: Neo4j GraphQL Library
 version: '6'
-display_version: '6-beta'
 start_page: ROOT:index.adoc
 nav:
 - modules/ROOT/content-nav.adoc

publish.yml

@@ -7,7 +7,7 @@ site:
 content:
   sources:
   - url: https://github.com/neo4j/docs-graphql.git
-    branches: ['5.x', '4.x', '3.x']
+    branches: ['6.x', '5.x', '4.x', '3.x']
     exclude:
     - '!**/_includes/*'
     - '!**/readme.adoc'
@@ -25,7 +25,7 @@ urls:
 antora:
   extensions:
   - require: "@neo4j-antora/antora-modify-sitemaps"
-    sitemap_version: '5'
+    sitemap_version: '6'
     sitemap_loc_version: 'current'
     move_sitemaps_to_components: true