fix(doc): Fix an incorrect consensus-critical ZIP 212 comment #78

Job	Run time
Check deny.toml bans	40s
Check Cargo.lock is up to date	1m 37s
Check deny.toml bans --features default-release-binaries	33s
Install zebrad from lockfile without cache on ubuntu-latest	18m 15s
Check deny.toml bans --all-features	39s
Check deny.toml sources	39s
Check deny.toml sources --features default-release-binaries	37s
Test stable on ubuntu-latest	1h 4m 3s
Check deny.toml sources --all-features	33s
Test stable on ubuntu-latest --features getblocktemplate-rpcs	1h 5m 50s
Test beta on ubuntu-latest	1h 10m 0s
Check for unused dependencies	12s
Open or update issues for OS integration failures	0s
	3h 43m 38s

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