docs: fix redirect link

[zeroshade]

fixes #491

[ianmcook]

-1 on fixing it this way. Other packages on pkg.go.dev don't need the version number in the URL to find the package page. Can you find out why the Arrow package needs it?

[ianmcook]

-1 on fixing it this way. Other packages on pkg.go.dev don't need the version number in the URL to find the package page. Can you find out why the Arrow package needs it?

Upon further investigation: It seems like pkg.go.dev doesn't provide any better way to do this :(

[kou]

+1

How about updating the v18 part automatically in release process?

apache/arrow-dotnet will do similar thing apache/arrow-dotnet#33 . So we can do it in apache/arrow-go too.

[zeroshade]

I'll look into automating the update for that. For now we'll merge this so that we can get the redirect fixed

[kou]

If you need, I can help the automation. :-)