README-DE: add GPU comparison table (Warum das existiert) at top #157

Job	Run time
nostd/thumbv6m-none-eabi/stable	32s
native-backend/stable	39s
clippy/stable	24s
Pass MSRV values to other jobs	3s
cross_test/i686-unknown-linux-gnu/stable	1m 35s
format/stable	19s
cross_test/s390x-unknown-linux-gnu/stable	1m 38s
cargo-careful	-1s
docs/nightly	-1s
miri	-1s
blas-msrv	56s
tests/1.64.0	1m 6s
tests/beta	1m 3s
tests/stable	51s
conclusion	0s
	9m 3s

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