net: comment for constant not accurate

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

Yes (sorry, this is a very insignificant issue, but I could not help it to raise it)

What operating system and processor architecture are you using (go env)?

What did you do?

https://cs.opensource.google/go/go/+/refs/tags/go1.19.4:src/net/dnsconfig.go

What did you expect to see?

attempts      int           // number of tries before giving up on a query

What did you see instead?

attempts      int           // lost packets before giving up on server