Update Cascadia sources to 2111.01

Also including the italic variants.

We do not use the PL versions but patch in the PL glyphs ourselves.
If this is smart can be discussed (I believe: no).

This does not add 'Cascadia Mono'.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

src/unpatched-fonts/CascadiaCode/README.rst

@@ -1,8 +1,8 @@
-Cascdia Code
-============
+Cascadia Code
+=============
 
 :Font creator: Microsoft
-:Version: 2007.11
+:Version: 2111.01
 :Source: https://github.com/microsoft/cascadia-code
 :License: SIL OPEN FONT LICENSE Version 1.1