docs: add `IMPORTANT` Notice to readme #124

Job	Run time
extract version	1s
build release (x86_64-unknown-linux-gnu, ubuntu-20.04, maxperf, op-build, op-reth)	22m 46s
build release (x86_64-unknown-linux-gnu, ubuntu-20.04, maxperf, bsc-build, bsc-reth)	22m 10s
build release (aarch64-unknown-linux-gnu, ubuntu-20.04, maxperf, op-build, op-reth)	24m 30s
build release (aarch64-unknown-linux-gnu, ubuntu-20.04, maxperf, bsc-build, bsc-reth)	23m 36s
build release (x86_64-apple-darwin, macos-13, maxperf, op-build, op-reth)	1h 3m 30s
build release (x86_64-apple-darwin, macos-13, maxperf, bsc-build, bsc-reth)	50m 11s
build release (aarch64-apple-darwin, macos-14, maxperf, op-build, op-reth)	1h 3m 38s
build release (aarch64-apple-darwin, macos-14, maxperf, bsc-build, bsc-reth)	1h 8m 26s
build release (x86_64-pc-windows-gnu, ubuntu-20.04, maxperf, op-build, op-reth)	23m 4s
build release (x86_64-pc-windows-gnu, ubuntu-20.04, maxperf, bsc-build, bsc-reth)	22m 13s
	6h 24m 5s

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