bug#44563: Update python-ipykernel to 5.3.4

[Maxim Cournoyer]

Hi Stephen,

Stephen Christie <spc@e.email> writes:

> I was trying to set up Jupyter notebook with guix-jupyter, but ran
> into an issue with receiving rendered images (e.g. from matplotlib),
> which crashes the ipykernel. I hope an update of python-ipykernel to
> upstream stable may fix this? If this is the case, it would likely be
> due to incompatibilities with newer python versions.
> Note that this issue only occurs when running through guix-jupyter, so it may 
> not be the source of that issue.
>
> Apologies for not creating a patch -- I am new to Guix and do not have a 
> development tree set up.

Closing this, as our python-ipykernel has since been updated since.
Please do report any problem you still encounter, if any.

Thank you!

Maxim