Added pip install of nbconvert

1 job for pages in 11 seconds
Status Job ID Name Coverage
  Deploy
failed #86304
pages

00:00:11

 
Name Stage Failure
failed
pages Deploy
From https://gricad-gitlab.univ-grenoble-alpes.fr/python-uga/training-hpc
- [deleted] (none) -> origin/fortran
* [new branch] pages -> origin/pages
Checking out 3b72962b as pages...

Skipping Git submodules setup
$ pip3 install nbconvert --user
/bin/bash: line 79: pip3: command not found
ERROR: Job failed: exit code 1