bug: pushd.apn not accepting pkcs8

### What happened?

Hi. 

I'm self-hosting Revolt but when I try to use the .p8 data that I created under my Apple Dev account to enable ios/macos notifications, pushd doesn't start with the following error:

```valid `pcks8`: InvalidByte(0, 45)```

Does anyone knows what should I change in order to make this work?

Thank you. 