Polishing.

Add since tags to extension methods and issue references to tests.
Update antora playbook to consider maintenance branches.

Original Pull Request: #4753

src/main/antora/antora-playbook.yml

@@ -17,7 +17,7 @@ content:
     - url: https://github.com/spring-projects/spring-data-commons
       # Refname matching:
       # https://docs.antora.org/antora/latest/playbook/content-refname-matching/
-      branches: [ main, 3.2.x ]
+      branches: [ main, 3.3.x, 3.2.x]
       start_path: src/main/antora
 asciidoc:
   attributes:

src/main/antora/modules/ROOT/pages/kotlin/extensions.adoc

@@ -19,7 +19,7 @@ val characters : Flux<SWCharacter> = template.query().inTable("star-wars").all()
 As in Java, `characters` in Kotlin is strongly typed, but Kotlin's clever type inference allows for shorter syntax.
 
 [[mongo.query.kotlin-support]]
-== Type-safe Queries and Updates for Kotlin
+== Type-safe Queries for Kotlin
 
 Kotlin embraces domain-specific language creation through its language syntax and its extension system.
 Spring Data MongoDB ships with a Kotlin Extension for `Criteria` using https://kotlinlang.org/docs/reference/reflection.html#property-references[Kotlin property references] to build type-safe queries.
@@ -64,7 +64,11 @@ mongoOperations.find<Book>(
 <3> To construct nested properties, use the `/` character (overloaded operator `div`).
 ====
 
-Similar syntax can be used while updating a document:
+[[mongo.update.kotlin-support]]
+== Type-safe Updates for Kotlin
+
+A syntax similar to <<mongo.query.kotlin-support>> can be used to update documents:
+
 ====
 [source,kotlin]
 ----