Fix build with tidy 5.
--- configure.orig	2023-12-05 02:27:59.000000000 -0600
+++ configure	2023-12-11 19:11:03.000000000 -0600
@@ -22794,7 +22794,7 @@
 LIBS="$LIBS -ltidy"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <tidy/tidy.h>
+#include <tidy.h>
 int
 main (void)
 {
--- src/plugins/html_extractor.c.orig	2017-06-10 07:09:20.000000000 -0500
+++ src/plugins/html_extractor.c	2017-07-08 02:58:23.000000000 -0500
@@ -26,8 +26,8 @@
 #include "platform.h"
 #include "extractor.h"
 #include <magic.h>
-#include <tidy/tidy.h>
-#include <tidy/tidybuffio.h>
+#include <tidy.h>
+#include <tidybuffio.h>
 
 /**
  * Mapping of HTML META names to LE types.