Fix signature of execute_modal_on_component_interaction #936

Job	Run time
Rustfmt	10s
Clippy	47s
Build docs	2m 25s
Test (MSRV)	1m 19s
Test (stable)	2m 0s
Test (beta)	2m 0s
Test (nightly)	2m 4s
Test (macOS)	4m 46s
Test (Windows)	5m 41s
Test (no features)	1m 13s
Test (all features - simdjson, cargo test --all-features --lib --tests --examples)	1m 21s
Test (native TLS, cargo test --all-features --features serenity/native_tls_backend --lib --tests ...	1m 20s
	25m 6s

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