docs: document versioning scheme #4213

Job	Run time
rustfmt	17s
ubuntu-latest - build	2m 51s
ubuntu-latest - check-m2-native	58s
ubuntu-latest - check-clippy	2m 43s
ubuntu-latest - check-clippy-verify-signature	2m 40s
ubuntu-latest - test-fvm	1m 10s
ubuntu-latest - test	3m 16s
ubuntu-latest - integration	6m 37s
ubuntu-latest - conformance	2m 20s
ubuntu-latest - calibration	7m 24s
macos-latest - build	1m 26s
macos-latest - check-clippy-verify-signature	3m 38s
macos-latest - integration	9m 17s
	44m 37s

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