docs: use cached pnpm installation (#128) #263

Job	Run time
Test with dest (4.11.1, ubuntu-latest)	9s
Test with run_install (null, ubuntu-latest)	10s
Test with dest (4.11.1, macos-latest)	16s
Test with run_install (empty object, ubuntu-latest)	14s
Test with dest (4.11.1, windows-latest)	43s
Test with run_install (recursive, ubuntu-latest)	11s
Test with standalone (ubuntu-latest, true)	12s
Test with default inputs (4.11.1, ubuntu-latest)	11s
Test with run_install (global, ubuntu-latest)	13s
Test with standalone (ubuntu-latest, false)	8s
Test with default inputs (4.11.1, macos-latest)	13s
Test with run_install (array, ubuntu-latest)	17s
Test with standalone (macos-latest, true)	13s
Test with default inputs (4.11.1, windows-latest)	57s
Test with run_install (null, macos-latest)	14s
Test with standalone (macos-latest, false)	8s
Test with run_install (empty object, macos-latest)	14s
Test with standalone (windows-latest, true)	41s
Test with run_install (recursive, macos-latest)	17s
Test with standalone (windows-latest, false)	27s
Test with run_install (global, macos-latest)	24s
Test with run_install (array, macos-latest)	19s
Test with run_install (null, windows-latest)	53s
Test with run_install (empty object, windows-latest)	56s
Test with run_install (recursive, windows-latest)	47s
Test with run_install (global, windows-latest)	1m 20s
Test with run_install (array, windows-latest)	59s
	11m 46s

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