DOC-3209: update api-reference version and fix nav.adoc order for fullpagehtml.

Author: kemister85

.api-version

@@ -1 +1 @@
-8.0.2
+8.1.0

modules/ROOT/nav.adoc

@@ -315,9 +315,9 @@
 **** JWT Authentication
 ***** xref:export-to-word-with-jwt-authentication-nodejs.adoc[Node.js]
 ***** xref:export-to-word-with-jwt-authentication-php.adoc[PHP]
-*** xref:fullpagehtml.adoc[Full Page HTML]
 *** xref:footnotes.adoc[Footnotes]
 *** xref:formatpainter.adoc[Format Painter]
+*** xref:fullpagehtml.adoc[Full Page HTML]
 *** xref:importword.adoc[Import from Word]
 **** xref:docx-to-html-converter-api.adoc[DOCX to HTML Converter API]
 **** JWT Authentication