Add calendar links to mini event
Update content/events/grid/mini_tournament/round1.md, content/events/grid/mini_tournament/round2.md, content/events/grid/mini_tournament/round3.md files
Update content/events/grid/mini_tournament/round1.md, content/events/grid/mini_tournament/round2.md, content/events/grid/mini_tournament/round3.md files