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CLAUDE.md: correct the .desc Begin-collision pitfall note #73

Job	Run time
Fedora (dnf, containerized)	13m 15s
macOS (Homebrew)	1m 54s
Ubuntu (apt)	11m 21s
Rocky Linux (dnf, RHEL family, containerized)	12m 36s
Debian (apt, containerized)	11m 56s
	51m 2s