DOC-2583 Update nav.adoc to match new page titles

Author: LewisAtTiny

modules/ROOT/nav.adoc

@@ -314,17 +314,17 @@
 *** xref:exportpdf.adoc[Export to PDF]
 **** xref:html-to-pdf-converter-api.adoc[HTML to PDF Converter API]
 **** JWT Authentication
-***** xref:export-to-pdf-with-jwt-authentication-with-PHP.adoc[Export to PDF with JWT authentication (PHP)]
+***** xref:export-to-pdf-with-jwt-authentication-with-php.adoc[Export to PDF with JWT authentication (PHP)]
 *** xref:exportword.adoc[Export to Word]
 **** xref:html-to-docx-converter-api.adoc[HTML to DOCX Converter API]
 **** JWT Authentication
-***** xref:export-to-word-with-jwt-authentication-with-PHP.adoc[Export to Word with JWT Authentication (PHP)]
+***** xref:export-to-word-with-jwt-authentication-with-php.adoc[Export to Word with JWT Authentication (PHP)]
 *** xref:footnotes.adoc[Footnotes]
 *** xref:formatpainter.adoc[Format Painter]
 *** xref:importword.adoc[Import from Word]
 **** xref:docx-to-html-converter-api.adoc[DOCX to HTML Converter API]
 **** JWT Authentication
-***** xref:import-word-with-jwt-authentication-with-PHP.adoc[Import From Word with JWT Authentication (PHP)]
+***** xref:import-word-with-jwt-authentication-with-php.adoc[Import From Word with JWT Authentication (PHP)]
 *** xref:editimage.adoc[Image Editing]
 *** xref:inline-css.adoc[Inline CSS]
 *** xref:linkchecker.adoc[Link Checker]