redact IP from proxy log channel open message

I missed a place where the miner IP gets logged. Or perhaps this is a regression introduced in the SRI version 1.5.0 reimplementation.
```
INFO translator_sv2::sv1::sv1_server::sv1_server: New SV1 downstream connection from XXX.XXX.XXX.XXX:XXXXX
```
Regardless, this log message should be added to the config option that redacts IP addresses.