Recurring event shows twice with one day offset

Steps to reproduce

1. Import

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:-//IDN nextcloud.com//Calendar app 4.6.5//EN
BEGIN:VEVENT
CREATED:20240221T100133Z
DTSTAMP:20240221T101146Z
LAST-MODIFIED:20240221T101146Z
SEQUENCE:6
UID:0e81-46fc-8c9a-44a4a8ee6093-c68a5083
DTSTART;VALUE=DATE:20240104
DTEND;VALUE=DATE:20240106
STATUS:CONFIRMED
SUMMARY:Test event
RRULE:FREQ=WEEKLY;BYDAY=TH,FR
EXDATE;VALUE=DATE:20240105
END:VEVENT
END:VCALENDAR

### Expected behavior

Event shows Thu+Fr

### Actual behaviour

Event shows Thu+Fr and Fr+Sa

![Bildschirmfoto vom 2024-02-21 13-55-19](https://github.com/nextcloud/calendar/assets/1374172/2d9bb6d8-b50e-4afa-981d-3897e9727fe6)


### Calendar app version

4.6

### CalDAV-clients used

_No response_

### Browser

_No response_

### Client operating system

_No response_

### Server operating system

_No response_

### Web server

None

### Database engine version

None

### PHP engine version

None

### Nextcloud version

_No response_

### Updated from an older installed version or fresh install

None

### List of activated apps

_No response_

### Nextcloud configuration

_No response_

### Web server error log

_No response_

### Log file

_No response_

### Browser log

_No response_

### Additional info

_No response_

Reproduce the issue by importing the provided ICS data into Calendar app 4.6, then trace recurrence expansion and EXDATE handling from the import path. No file or test is named in the report; done means the event appears only as Thu+Fri, without the extra Fri+Sat occurrence, with regression coverage for this recurrence case.