PlexonIO: Fix another plexon overflow

[zm711]

@h-mayorquin could I have you give this a quick read through. Then we can have Sam merge it later.

Error here:

https://readthedocs.org/projects/neo/builds/25985599/

[h-mayorquin]

Ok.

I wonder how comes this failed now and not before and why this is being executed on the read the docs : /

[zm711]

I wonder how comes this failed now and not before

I've been messing with CI stuff so maybe I changed over some cache thing or version thing. Who knows....

why this is being executed on the read the docs : /

To show off Neo with real data. I suggested simulated in the past and the point was this can work with real data so it should show real data.

Thanks Heberto!

[zm711]

Just for your info Heberto RTD changed something recently so maybe this precipitated the issue (it shouldn't have but who knows at this point):
https://about.readthedocs.com/blog/2024/07/addons-by-default/#how-to-opt-in-to-addons-now