docs: add statpixel to bots using poise #1062

Job	Run time
Clippy	1m 2s
Rustfmt	10s
Build docs	1m 34s
Test (MSRV)	1m 20s
Test (stable)	2m 18s
Test (beta)	2m 7s
Test (nightly)	1m 58s
Test (macOS)	1m 26s
Test (Windows)	4m 52s
Test (no features)	1m 15s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 12s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 22s
	20m 36s

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