Require encoding option for console and file sinks

The encoding option is now required for these sinks

The dynamic encoding concept in Vector was confusing users, so we’ve made it required and explicit. Simply add encoding = "json" to your console and file sinks.

Upgrade Guide

Make the following changes in your vector.toml file:

 [sinks.console]
   type = "console"
+  encoding = "json"

 [sinks.file]
   type = "file"
+  encoding = "json"

That’s it!