DATAMONGO-1983 - Include transactions reference documentation page.

We now render the transaction support within our reference docs.

src/main/asciidoc/index.adoc

@@ -30,6 +30,7 @@ include::{spring-data-commons-docs}/repositories.adoc[leveloffset=+1]
 
 include::reference/introduction.adoc[leveloffset=+1]
 include::reference/mongodb.adoc[leveloffset=+1]
+include::reference/client-session-transactions.adoc[leveloffset=+1]
 include::reference/reactive-mongodb.adoc[leveloffset=+1]
 include::reference/mongo-repositories.adoc[leveloffset=+1]
 include::reference/reactive-mongo-repositories.adoc[leveloffset=+1]

src/main/asciidoc/reference/client-session-transactions.adoc

@@ -33,7 +33,7 @@ template.withSession(() -> session)
         Person azoth = new Person("Kylar Stern");
         azoth.setMaster(durzo);
 
-        action.insert(azoth);                                <2>
+        action.insert(azoth);                                <3>
 
         return azoth;
     });