JFIF format is not supported in Attachments as image

[VladIvanov2001]

JFIF format is not currently supported as an image in Attachments. JFIF is a file format used to store and exchange JPEG-compressed images. However, when I upload a JFIF file, the image preview is not displayed. The Ant Design Upload component already supports this format. Could you please add support for JFIF as a valid image format?

[hylin]

In the works. #1006