fix: Resolved Typescript Error in PR #9598 created by @vijeet-shah. (#10871)

Co-authored-by: Udit Takkar <53316345+Udit-takkar@users.noreply.github.com>
Co-authored-by: vijeet-shah <93502358+vijeet-shah@users.noreply.github.com>
Co-authored-by: Udit Takkar <udit.07814802719@cse.mait.ac.in>

apps/web/components/getting-started/steps-views/SetupAvailability.tsx

@@ -20,10 +20,11 @@ const SetupAvailability = (props: ISetupAvailabilityProps) => {
   const { t } = useLocale();
   const { nextStep } = props;
 
+  const scheduleId = defaultScheduleId === null ? undefined : defaultScheduleId;
   const queryAvailability = trpc.viewer.availability.schedule.get.useQuery(
-    { scheduleId: defaultScheduleId! },
+    { scheduleId },
     {
-      enabled: !!defaultScheduleId,
+      enabled: !!scheduleId,
     }
   );