docs: reference v2 in examples; update pnpm to v12.0.0-beta.4 (#16) #42

Job	Run time
Smoke pnpm 11 (ubuntu-24.04-arm)	9s
Runtime deno	10s
Smoke pnpm 11 (macos-latest)	11s
Version from semver range (^12.0.0-0)	6s
Runtime node@22 (windows-latest)	17s
Version from dist-tag (next-12)	9s
runtime version falls back to devEngines	10s
Explicit runtime overrides devEngines.runtime	9s
Runtime from devEngines.runtime	11s
Smoke (windows-latest / pnpm 12.0.0-beta.4)	18s
Smoke (macos-latest / pnpm 12.0.0-beta.4)	14s
Runtime node@22 (ubuntu-latest)	11s
Runtime node + install on pnpm 11	14s
Smoke pnpm 11 (windows-latest)	14s
Runtime node@22 (macos-latest)	14s
Runtime bun	7s
Smoke (ubuntu-24.04-arm / pnpm 12.0.0-beta.4)	7s
Smoke (ubuntu-latest / pnpm 12.0.0-beta.4)	9s
Smoke pnpm 11 (ubuntu-latest)	11s
install: false skips pnpm install	9s
No runtime, no manifest	13s
	3m 53s

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