Add note regarding floating point errors to assert_eq #1359

Job	Run time
Extract crate metadata	2s
WASM version	2m 30s
Documentation checks	6m 11s
Ensure 'cargo fmt' has been run	14s
Minimum supported rust version	2m 6s
aarch64-unknown-linux-gnu (ubuntu-20.04)	3m 43s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	4m 6s
arm-unknown-linux-musleabihf (ubuntu-20.04)	3m 57s
i686-pc-windows-msvc (windows-2019)	6m 53s
i686-unknown-linux-gnu (ubuntu-20.04)	3m 42s
i686-unknown-linux-musl (ubuntu-20.04)	4m 15s
x86_64-apple-darwin (macos-12)	4m 8s
x86_64-pc-windows-msvc (windows-2019)	7m 13s
x86_64-unknown-linux-gnu (ubuntu-20.04)	3m 27s
x86_64-unknown-linux-musl (ubuntu-20.04)	3m 47s
	56m 14s

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