Update Nord theme to match reference implementation #132

Job	Run time
Extract crate metadata	3s
Ensure 'cargo fmt' has been run	7s
Minimum supported rust version	23s
aarch64-unknown-linux-gnu (ubuntu-20.04)	1m 14s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	1m 25s
arm-unknown-linux-musleabihf (ubuntu-20.04)	1m 20s
i686-pc-windows-msvc (windows-2019)	1m 41s
i686-unknown-linux-gnu (ubuntu-20.04)	1m 13s
i686-unknown-linux-musl (ubuntu-20.04)	57s
x86_64-apple-darwin (macos-12)	56s
x86_64-pc-windows-gnu (windows-2019)	1m 55s
x86_64-pc-windows-msvc (windows-2019)	1m 36s
x86_64-unknown-linux-gnu (ubuntu-20.04)	57s
x86_64-unknown-linux-musl (ubuntu-20.04)	1m 13s
	15m 0s

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