Typo in documentation section 7.3

The example code in section 7.3 Referencing sub-figures without sub-captions of the documentation has a \begin{subcaptiongroup} but a non matching \end{subcaptionblock} in the CTAN version 1.6b 2023-07-28 and thus does not compile. I would highly recommend correcting this using either subcaptiongroup or subcaptionblock.