DOC-3131: Fix sidebar nesting issue.

Author: kemister85

modules/ROOT/partials/configuration/onboarding.adoc

@@ -1,5 +1,3 @@
-= Cloud promotion
-
 [[onboarding]]
 == `+onboarding+`
 
@@ -13,12 +11,11 @@ The promotion will automatically disappear when the trial ends.
 
 *Possible values:* `+true+`, `+false+`
 
-=== Example: using cloud `+onboarding+`
-
+.Example: using cloud `+onboarding+`
 [source,js]
 ----
 tinymce.init({
   selector: "textarea",  // change this value according to your HTML
   onboarding: false
 });
-----
+----

modules/ROOT/partials/configuration/promotion.adoc

@@ -1,7 +1,5 @@
-= Open source promotion
-
 [[promotion]]
-== `+promotion+`
+== `+promotion+`  
 
 The open source version of {productname} contains a promotion for paid features. This promotion can be toggled on or off with the `+promotion+` option.
 
@@ -11,8 +9,7 @@ The open source version of {productname} contains a promotion for paid features.
 
 *Possible values:* `+true+`, `+false+`
 
-=== Example: using open source `+promotion+`
-
+.Example: using open source `+promotion+`
 [source,js]
 ----
 tinymce.init({

modules/ROOT/partials/misc/premium-upgrade-promotion-option.adoc

@@ -1,6 +1,7 @@
-[[options]]
-== Options
+== Open source promotion
 
 include::partial$configuration/promotion.adoc[leveloffset=+1]
 
+== Cloud promotion
+
 include::partial$configuration/onboarding.adoc[leveloffset=+1]