LibJS: Add two missing missing ECMA-262 section/title/URL comments

Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp

@@ -123,6 +123,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::slice)
     return new_array_buffer_object;
 }
 
+// 25.1.5.1 get ArrayBuffer.prototype.byteLength, https://tc39.es/ecma262/#sec-get-arraybuffer.prototype.bytelength
 JS_DEFINE_NATIVE_GETTER(ArrayBufferPrototype::byte_length_getter)
 {
     auto array_buffer_object = array_buffer_object_from(vm, global_object);

Userland/Libraries/LibJS/Runtime/SetConstructor.cpp

@@ -21,7 +21,10 @@ void SetConstructor::initialize(GlobalObject& global_object)
 {
     auto& vm = this->vm();
     NativeFunction::initialize(global_object);
+
+    // 24.2.2.1 Set.prototype, https://tc39.es/ecma262/#sec-set.prototype
     define_property(vm.names.prototype, global_object.set_prototype(), 0);
+
     define_property(vm.names.length, Value(0), Attribute::Configurable);
 
     define_native_accessor(vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);