DOC-12808 add cbl sgw 4.0 (#853)

Author: iamfortune

antora-playbook.yml

@@ -34,7 +34,7 @@ site:
         { "title": "Cloud-Native", "components": ["cloud-native-database"] },
         { "title": "Kubernetes Operator", "startPage": "operator::overview.adoc", "components": ["operator"] },
         { "title": "CMOS", "components": ["cmos"] },
-        { "title": "Develop", "startPage": "home::developer.adoc", 
+        { "title": "Develop", "startPage": "home::developer.adoc",
             "subGroups": [
               {
                 "title": "Operational SDKs",
@@ -242,10 +242,10 @@ content:
     branches: [release/3.1, release/2.8]
 
   - url: https://github.com/couchbaselabs/docs-couchbase-lite
-    branches: [release/3.3, release/3.2, release/3.1, release/3.0, release/2.8]
+    branches: [release/4.0, release/3.3, release/3.2, release/3.1, release/3.0, release/2.8]
 
   - url: https://github.com/couchbaselabs/docs-sync-gateway
-    branches: [release/3.3, release/3.2, release/3.1, release/3.0, release/2.8]
+    branches: [release/4.0, release/3.3, release/3.2, release/3.1, release/3.0, release/2.8]
 
   - url: https://github.com/couchbaselabs/docs-couchbase-lite-edge-server
     branches: [release/1.0]