chore: add a link to the docs in the readme #661

Job	Run time
tests	8m 55s
lint	2m 41s
compat-integration-test-instrumentation (-p codspeed-divan-compat-examples)	2m 32s
compat-integration-test-instrumentation (-p codspeed-bencher-compat)	2m 25s
compat-integration-test-instrumentation (-p codspeed)	1m 29s
compat-integration-test-walltime (codspeed-criterion-compat)	11m 19s
compat-integration-test-walltime (codspeed-divan-compat)	4m 18s
compat-integration-test-instrumentation (--features async_futures -p codspeed-criterion-compat)	1m 53s
compat-integration-test-walltime (codspeed-divan-compat-examples)	5m 1s
compat-integration-test-instrumentation (-p codspeed-divan-compat)	1m 39s
msrv-check	49s
check	4s
	43m 5s

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