Update folder-caseSensitiveFS.rst

[camoz]

Add Android to list of systems that are case-insensitive.

(The last part of the sentence that was removed was kind of redundant.)

[calmh]

It's not really redundant as you may well run with case insensitive FAT on Linux etc.

[camoz]

Yeah, that's why I wrote "kind of". The sentence talks about case(in)sensitive systems and case(in)sensitive filesystems, which makes it more complicated. I only removed the second part of the sentence, because with it, it became unnecessarily long and a bit weird to read, IMO. Feel free to suggest anything better or just dismiss this PR. I just thought it would be nice to have Android included there, since it's a popular platform for syncthing.

Edit: If you assume case(in)sensitive systems == case(in)sensitive filesystems, then it is completely redundant though.

[calmh]

I don't feel that adding two more operating systems, with one only being tangentially support by Syncthing to begin with, really adds much clarity here; it mostly makes the sentence longer.