Silence noise from debug gem in Rails 7
Silence noise from debug gem in Rails 7

Prior to this change, running a Rails 7 test suite resulted in the
following output:

```
DEBUGGER: Attaching after process 14315 fork to child process 14330
DEBUGGER[bin/rails#14331]: Attaching after process 14315 fork to child process 14331
DEBUGGER[bin/rails#14332]: Attaching after process 14315 fork to child process 14332
DEBUGGER[bin/rails#14333]: Attaching after process 14315 fork to child process 14333
DEBUGGER[bin/rails#14334]: Attaching after process 14315 fork to child process 14334
DEBUGGER[bin/rails#14335]: Attaching after process 14315 fork to child process 14335
DEBUGGER[bin/rails#14336]: Attaching after process 14315 fork to child process 14336
DEBUGGER[bin/rails#14337]: Attaching after process 14315 fork to child process 14337
DEBUGGER[bin/rails#14338]: Attaching after process 14315 fork to child process 14338
DEBUGGER[bin/rails#14339]: Attaching after process 14315 fork to child process 14339
```

Oof. That's a lot.

This change silences that output.

jasonrudolph/dotfiles,jasonrudolph/dotfiles,jasonrudolph/dotfiles,jasonrudolph/dotfiles