fix: fix illegible font color in calendar

src/tailwind.css

@@ -292,7 +292,7 @@ thead .fc-day-selected:hover {
     }
 
     &.is-fallback {
-      @apply tw-bg-yellow-50 tw-border-yellow-50 tw-text-yellow-900 dark:tw-bg-yellow-950 dark:tw-border-yellow-950 tw-text-yellow-100 tw-pointer-events-none;
+      @apply tw-bg-yellow-50 tw-border-yellow-50 tw-text-yellow-900 dark:tw-bg-yellow-950 dark:tw-border-yellow-950 tw-pointer-events-none;
       & .fc-event-main {
         @apply tw-relative tw-h-full;