Sequana-demultiplex

Use graphviz apptainer and latest wrappers

What's Changed
* Fix CI (ubuntu version) and use new pipetools 0.9 by cokelaer in https://github.com/sequana/demultiplex/pull/8


**Full Changelog**: https://github.com/sequana/demultiplex/compare/v1.2.0...v1.2.1

Fix CI and documentation for a stable version

add --mars-seq option

Fix typo in merging_strategy option

Fixing regression bug in the html summary report