### Godot version

4.0.beta14

### System information

windows 10, gles 3, nvidia graphics

### Issue description

SCREEN_TEXTURE  was dropped in beta 14. The suggested replacement is to use ```uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmaps;```, but filter_linear_mipmaps is not recognized as a valid shader type hint and a shader using it fails to compile.

### Steps to reproduce

Create a canvas item shader and use the filter_linear_mipmaps type hint with a sampler2D uniform.

### Minimal reproduction project

N/A
} else {
				from += get_datatype_name(type);
			}
			from += "[";
			from += itos(array_size);
			from += "]'";
			String to;
			if (type == TYPE_STRUCT) {
				to += p_struct_name;
			} else {
				to += get_datatype_name(p_type);
			}
			to += "[";
			to += itos(p_array_size);
			to += "]'";
			_set_error(vformat(RTR("Cannot convert from '%s' to '%s'."), from, to));
			return nullptr;
		}
	}
	ArrayConstructNode *an = alloc_node<ArrayConstructNode>();
	an->datatype = p_type;
	an->struct_name = p_struct_name;
	if (tk.type == TK_PARENTHESIS_OPEN || auto_size) { 
		while (true) {
			Node *n = _parse_and_reduce_expression(p_block, p_function_info);
			if (!n) {
				return nullptr;
			}
			if (!_compare_datatypes(p_type, p_struct_name, 0, n->get_datatype(), n->get_datatype_name(), n->get_array_size())) {
				return nullptr;