Ladybird: Rename new-tab.html file to newtab.html

Meta/gn/secondary/Ladybird/BUILD.gn

@@ -296,7 +296,7 @@ if (current_os == "mac") {
     sources = [
       "//Base/res/ladybird/inspector.css",
       "//Base/res/ladybird/inspector.js",
-      "//Base/res/ladybird/new-tab.html",
+      "//Base/res/ladybird/newtab.html",
       "//Base/res/ladybird/templates/directory.html",
       "//Base/res/ladybird/templates/error.html",
     ]

Userland/Applications/BrowserSettings/Defaults.h

@@ -11,7 +11,7 @@
 namespace Browser {
 
 static constexpr StringView default_homepage_url = "resource://html/misc/welcome.html"sv;
-static constexpr StringView default_new_tab_url = "resource://ladybird/new-tab.html"sv;
+static constexpr StringView default_new_tab_url = "resource://ladybird/newtab.html"sv;
 static constexpr StringView default_color_scheme = "auto"sv;
 static constexpr bool default_enable_content_filters = true;
 static constexpr bool default_show_bookmarks_bar = true;