docs: explain how we compare #681

Job	Run time
Build docs & run doctests	29s
Verify dev env (ubuntu-latest)	16s
Verify dev env (windows-latest)	46s
Check types using pyright	39s
Tests & Mypy on 3.7	1m 10s
Tests & Mypy on 3.8	1m 39s
Tests & Mypy on 3.9	1m 24s
Tests & Mypy on 3.10	2m 32s
Tests & Mypy on 3.11	1m 36s
Tests & Mypy on 3.12	1m 47s
Tests & Mypy on pypy-3.8	1m 3s
Tests & Mypy on pypy-3.9	1m 0s
Tests & Mypy on pypy-3.10	1m 22s
Combine & check coverage.	18s
required-checks-pass	5s
	16m 6s

Provide feedback