fix(calcom): simplify required field constraints for booking attendee

The condition field already restricts these to calcom_create_booking,
so simplified to required: true. Per Cal.com API docs, email is optional
while name and timeZone are required.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/blocks/blocks/calcom.ts

@@ -119,7 +119,7 @@ Return ONLY the timestamp string - no explanations or quotes.`,
       type: 'short-input',
       placeholder: 'Enter attendee name',
       condition: { field: 'operation', value: 'calcom_create_booking' },
-      required: { field: 'operation', value: 'calcom_create_booking' },
+      required: true,
     },
     {
       id: 'attendeeEmail',
@@ -134,7 +134,7 @@ Return ONLY the timestamp string - no explanations or quotes.`,
       type: 'short-input',
       placeholder: 'e.g., America/New_York, Europe/London',
       condition: { field: 'operation', value: 'calcom_create_booking' },
-      required: { field: 'operation', value: 'calcom_create_booking' },
+      required: true,
     },
     {
       id: 'attendeePhone',