[GTK3] Unreviewed fix build after 300786@main

https://bugs.webkit.org/show_bug.cgi?id=299627

* Source/WebKit/WebProcess/InjectedBundle/API/glib/DOM/DOMObjectCache.cpp:
Add missing header 'WebCore/NodeDocument'.

Canonical link: https://commits.webkit.org/300816@main

Author: dpino

Source/WebKit/WebProcess/InjectedBundle/API/glib/DOM/DOMObjectCache.cpp

@@ -24,6 +24,7 @@
 #include <WebCore/FrameDestructionObserverInlines.h>
 #include <WebCore/LocalDOMWindow.h>
 #include <WebCore/LocalFrameInlines.h>
+#include <WebCore/NodeDocument.h>
 #include <WebCore/NodeInlines.h>
 #include <glib-object.h>
 #include <wtf/HashMap.h>