Update data_preferences.rst

[tredstart]

Change the OrderedHashMap to HashMap to remove potential confusion and keep docs in sync with the actual implementation.

Currently docs point to the not-existing class OrderedHashMap .
Dictionary, instead, uses a different class HashMap

struct DictionaryPrivate {
	SafeRefCount refcount;
	Variant *read_only = nullptr; // If enabled, a pointer is used to a temporary value that is used to return read-only values.
	HashMap<Variant, Variant, VariantHasher, StringLikeVariantComparator> variant_map;
	ContainerTypeValidate typed_key;
	ContainerTypeValidate typed_value;
	Variant *typed_fallback = nullptr; // Allows a typed dictionary to return dummy values when attempting an invalid access.
};

[skyace65]

Confirmed this is how dictionary is implemented in dictionary.cpp in the engine.

[skyace65]

Thanks! And congrats on your first merged PR!

[tredstart]

Thanks! And congrats on your first merged PR!

Thanks :) I will try to contribute more