Move doc to 9.10 section

Author: janhoy

solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc

@@ -67,10 +67,11 @@ It is always strongly recommended that you fully reindex your documents after a
 In Solr 8, it was possible to add docValues to a schema without re-indexing via `UninvertDocValuesMergePolicy`, an advanced/expert utility.
 Due to changes in Lucene 9, that isn't possible any more.
 
-== Solr 9.9
+== Solr 9.10
 === Java Security Manager
 Java removed support for the Security Manager starting with Java 24, therefore Solr will disable the feature when run with Java 24 or later.
 
+== Solr 9.9
 === SolrJ
 
 If Http2SolrClient.Builder.withHttpClient is used, (and it's used more in 9.8, shifted from deprecated Apache HttpClient based clients), settings affecting HttpClient construction cannot be customized; an IllegalStateException will now be thrown if you try.