add links to workshops & campus

[FeHoff]

BIDS https://bids.neuroimaging.io
quantitative/histology MRI https://hmri-group.github.io/hMRI-toolbox/
Neuroimaging Statistics Workshop https://sites.google.com/view/nsw2026

Campus victoire https://www.u-bordeaux.fr/campus/decouvrir-les-campus/campus-victoire

[FeHoff]

Please update hMRI workship link: https://hmri-group.github.io/hMRI-Bordeaux-meeting/