handbook/wine: add Mizuma's source code URL, and small typos

[rilysh]

1. It's particularly interesting to know what games/apps are currently "supported" through Mizuma, so it's a good idea to link the source code URL (winetricks source code URL is also already mentioned.)
2. Remove the word "some" from the synopsis. It's ambiguous to know the meaning of "some" here, whereas Wine is intended (and does support) a wide range of Windows applications out of the box.
3. Use the word GitHub instead Github (ignorable).
4. Also edit the Arch Wiki URL (it redirects to that new URL from the previous one) (forgot to mention in the commit).