Tweak README #1445

Job	Run time
Install dependencies without using a lockfile	6m 9s
TypeScript compatibility (~5.2)	17s
Test package-lock for unexpected modifications	14s
Node.js (^18.18, ubuntu-latest)	3m 22s
Lint source files	32s
Node.js (^18.18, windows-latest)	6m 57s
Node.js (^18.18, macos-latest)	5m 20s
Node.js (^20.8, ubuntu-latest)	5m 58s
Node.js (^20.8, windows-latest)	7m 51s
Node.js (^20.8, macos-latest)	6m 23s
Node.js (^21, ubuntu-latest)	6m 0s
Node.js (^21, windows-latest)	7m 25s
Node.js (^21, macos-latest)	8m 1s
	1h 4m 29s

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