Fix section levels in the "what's new" doc

Author: marko-bekhta

documentation/src/main/asciidoc/public/whats-new/index.adoc

@@ -33,7 +33,7 @@ OpenSearch::
 The Elasticsearch backend works with OpenSearch 3.2 and 3.3, as well as other already compatible versions.
 
 [[pluggable-clients]]
-=== Pluggable Elasticsearch backend REST clients
+== Pluggable Elasticsearch backend REST clients
 
 This version of Hibernate Search introduces pluggable REST clients for the Elasticsearch backend.
 Historically, the Elasticsearch backend relied on the Elasticsearch low-level REST client,
@@ -45,7 +45,7 @@ or when you need to use some distribution specific client features and for examp
 Hibernate Search provides the following REST client options out of the box:
 
 [[backend-elasticsearch-configuration-client-elasticsearch-client-rest4]]
-==== Elasticsearch low level REST client (Apache HTTP Client 4)
+=== Elasticsearch low level REST client (Apache HTTP Client 4)
 
 Coordinates::
 GroupID::: `org.hibernate.search`
@@ -67,7 +67,7 @@ This Elasticsearch backend REST client is based on the newer Elasticsearch low l
 which is also used in the `co.elastic.clients:elasticsearch-java`.
 
 [[backend-elasticsearch-configuration-client-elasticsearch-client-opensearch]]
-==== OpenSearch low level REST client (Apache HTTP Client 5)
+=== OpenSearch low level REST client (Apache HTTP Client 5)
 
 Coordinates::
 GroupID::: `org.hibernate.search`
@@ -81,7 +81,7 @@ of Hibernate Search we will remove the implicit dependency on `hibernate-search-
 from the Elasticsearch backend.
 
 [[backend-elasticsearch-configuration-client-elasticsearch-client-jdk]]
-==== Simple REST client based on the JDKs `HttpClient`
+=== Simple REST client based on the JDKs `HttpClient`
 
 Coordinates::
 GroupID::: `org.hibernate.search`

documentation/src/main/assembly/pdf.xml

@@ -30,7 +30,7 @@
 		</file>
 		<file>
 			<source>${asciidoctor.base-output-dir}/pdf/public/whats-new/index.pdf</source>
-			<outputDirectory>reference/en-US/pdf/</outputDirectory>
+			<outputDirectory>whats-new/en-US/pdf/</outputDirectory>
 			<destName>hibernate_search_whats_new.pdf</destName>
 		</file>
 		<file>