[Sibiu-2026] Added portainer.io as bronze sponso, update speaker photo.#15716

Ovijmek21 wants to merge 2 commits intodevopsdays:maindevopsdays/devopsdays-web:mainfrom

mihai-satmarean:event/2026-sibiumihai-satmarean/devopsdays-web:event/2026-sibiuCopy head branch name to clipboard