Discourse Calendar atualizado para usar fullcalendar 6

[RGJ (Richard - Communiteq)]

@sam

Struggling to understand why /day/2025/09/01 is so much better than /day/2025/9/1

Because /day/2025/09/01 sorts alphabetically before /day/2025/10/01, and /day/2025/9/1 does not?