icon: update jami.ico icon

https://docs.microsoft.com/en-us/windows/win32/uxguide/vis-icons?redirectedfrom=MSDN

According to the doc, ico files need to contain multiple sizes of bmp
to support different types of Windows view.

This patch will also remove the weird border around the icon.

Gitlab: #595

Change-Id: I1fed5cc83c447ec47dc9982ebc58a18ae978d758