README's new-version branch instructions point to an outdated branch

[wiskiiii]

Hi! Thanks for maintaining MacNewFile.

I followed the README's "Manual Download All Features" instructions, specifically step 3 which says to check out the new-version branch before building from Xcode.

It looks like new-version is currently behind main / v3.1.1 and is missing fixes that are already in the released version. One visible symptom is that the Finder toolbar item shows the large caution icon instead of the add icon, because new-version still has:

return [NSImage imageNamed:NSImageNameCaution];

while main uses:

return [NSImage imageNamed:NSImageNameAddTemplate];

Could you update the branch? Thanks!