LibWeb: Add calls to JS_{DECLARE,DEFINE}_ALLOCATOR()

Author: https://github.com/mattco98
Commit: 31341b280a
Pull-request: https://github.com/SerenityOS/serenity/pull/23878
Issue: https://github.com/SerenityOS/serenity/issues/23805
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/Geometry/DOMMatrixReadOnly.cpp

@@ -20,6 +20,8 @@
 
 namespace Web::Geometry {
 
+JS_DEFINE_ALLOCATOR(DOMMatrixReadOnly);
+
 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-dommatrixreadonly
 WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMMatrixReadOnly>> DOMMatrixReadOnly::construct_impl(JS::Realm& realm, Optional<Variant<String, Vector<double>>> const& init)
 {