Update pandoc_makedocs.sh for pandocker 23.03

[cpholguera]

The new release https://github.com/dalibo/pandocker/releases/tag/24.05 is breaking our doc generation. So we're going back to the previous release 23.03.

Digest: sha256:3a0436dfa85c5b12580afc921ebd65097dce3cacf2befdcccac5898e472565ce
Status: Downloaded newer image for dalibo/pandocker:stable
Warning:  Could not fetch resource Images/Chapters/0x03/owasp-mobile-overview.png%22%20alt=%22image: replacing image with description
Error producing PDF.
! Missing \endcsname inserted.
<to be read again> 
                   \__kernel_tl_set:Nx 
l.456 ...aperwidth,height=\paperheight]{cover.pdf}

Error: Process completed with exit code 43.