loading up the forgejo repo on tangled to test page performance

Add .mailmap with aliases for Unknwon (github.com/Unknwon)

without it looks like this:

❯ git shortlog -sn | head
1674 Unknwon
1643 Lunny Xiao
1499 GiteaBot
1186 zeripath
1147 Earl Warren
1093 silverwind
752 wxiaoguang
573 Unknown
537 6543
524 Gusted

with:

❯ git shortlog -sn | head
2635 Unknwon
1643 Lunny Xiao
1499 GiteaBot
1186 zeripath
1147 Earl Warren
1093 silverwind
752 wxiaoguang
537 6543
524 Gusted
385 techknowlogick

Changed files
+2
+2
.mailmap
··· 1 + Unknwon <u@gogs.io> <joe2010xtmf@163.com> 2 + Unknwon <u@gogs.io> 无闻 <u@gogs.io>