fix: image format

Author: alv67

docs/lego-set-42100/unboxing-lego-set-42100.md

@@ -346,7 +346,7 @@ Picture | Qty | Code | Description | Color |
 --------|----:|------|-------------|-------|
 ![11214](https://img.bricklink.com/P/5/11214.jpg)| 17 | [11214](https://www.bricklink.com/v2/catalog/catalogitem.page?P=11214&idColor=5) | Technic, Axle  1L with Pin 2L with Friction Ridges | Red
 ![18651](https://img.bricklink.com/P/11/18651.jpg)| 2 | [18651](https://www.bricklink.com/v2/catalog/catalogitem.page?P=18651&idColor=11) | Technic, Axle  2L with Pin with Friction Ridges | Black
-![27940](https://img.bricklink.com/ItemImage/PN/85/27940.png)| 2 | [27940](https://www.bricklink.com/v2/catalog/catalogitem.page?P=27940) | Technic, Axle and Pin Connector Hub with 2 Axles on Opposite Sides | Dark Bluish Gray
+![27940](https://img.bricklink.com/P/85/27940.jpg)| 2 | [27940](https://www.bricklink.com/v2/catalog/catalogitem.page?P=27940) | Technic, Axle and Pin Connector Hub with 2 Axles on Opposite Sides | Dark Bluish Gray
 ![32013](https://img.bricklink.com/P/1/32013.jpg)| 4 | [32013](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32013&idColor=1) | Technic, Axle and Pin Connector Angled #1 | White
 ![32063](https://img.bricklink.com/P/1/32063.jpg)| 2 | [32063](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32063&idColor=1) | Technic, Liftarm Thin 1 x 6 | White
 ![32073](https://img.bricklink.com/P/3/32073.jpg)| 2 | [32073](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32073&idColor=3) | Technic, Axle  5L | Yellow