Fix build failure on case-sensitive filesystems.
https://github.com/newzealandpaul/webarchiver/pull/17
--- webarchiver.m.orig	2024-08-29 19:26:34.000000000 -0500
+++ webarchiver.m	2025-01-30 07:57:54.000000000 -0600
@@ -1,7 +1,7 @@
 //If you use this code, please link to my blog: http://www.entropytheblog.com/blog/ . thanks.
 
 #import <Foundation/Foundation.h>
-#import <Webkit/Webkit.h>
+#import <WebKit/WebKit.h>
 #import <WebKit/WebArchive.h>
 #import "KBWebArchiver.h"