Examples need updating to new config format

[markmandel]

What happened:

Running through all the [examples[(https://github.com/googleforgames/quilkin/tree/main/examples), they break because they have the old config yaml fomat.

What you expected to happen:

For them to work.

How to reproduce it (as minimally and precisely as possible):

./target/debug/quilkin -c ./examples/agones-xonotic/client-compress.yaml run

Anything else we need to know?:

Should be easy enough to fix.

Environment:

• Quilkin version: dev
• Execution environment (binary, container, etc): binary
• Operating system: Linyx
• Custom filters? (Yes/No - if so, what do they do?): No
• Log(s):

➜  quilkin git:(bug/mdbook-yaml) ✗ ./target/debug/quilkin -c ./examples/agones-xonotic/client-compress.yaml run
{"timestamp":"2022-08-09T00:46:18.250183Z","level":"INFO","fields":{"message":"Starting Quilkin","version":"0.4.0-dev+debug","commit":"25d93603c7c83603def8e79d26a390d5dc83755f"},"target":"quilkin"}
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: filter `quilkin.extensions.filters.compress.v1alpha1.Compress` not found at line 17 column 8', src/main.rs:195:10
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

• Others: N/A