docs: fix npmMinimalAgeGate default value. #11896

Job	Run time
Testing chores	2m 26s
Acceptance test node versions	2s
Build artifacts	1m 27s
ubuntu-latest w/ Node.js 20.x (1/2)	6m 18s
ubuntu-latest w/ Node.js 18.x (1/2)	7m 6s
macos-latest w/ Node.js 18.x (1/3)	2m 47s
windows-latest w/ Node.js 22.x (2/3)	9m 27s
windows-latest w/ Node.js 18.x (1/3)	5m 44s
ubuntu-latest w/ Node.js 18.x (2/2)	6m 4s
macos-latest w/ Node.js 22.x (2/3)	5m 5s
ubuntu-latest w/ Node.js 26.x (1/2)	6m 16s
windows-latest w/ Node.js 18.x (3/3)	5m 31s
macos-latest w/ Node.js 18.x (2/3)	5m 19s
ubuntu-latest w/ Node.js 24.x (1/2)	6m 19s
ubuntu-latest w/ Node.js 20.x (2/2)	5m 44s
windows-latest w/ Node.js 22.x (3/3)	4m 12s
windows-latest w/ Node.js 22.x (1/3)	5m 35s
windows-latest w/ Node.js 18.x (2/3)	10m 40s
ubuntu-latest w/ Node.js 26.x (2/2)	5m 59s
ubuntu-latest w/ Node.js 24.x (2/2)	5m 15s
macos-latest w/ Node.js 22.x (3/3)	3m 38s
ubuntu-latest w/ Node.js 22.x (1/2)	6m 23s
macos-latest w/ Node.js 18.x (3/3)	3m 42s
ubuntu-latest w/ Node.js 22.x (2/2)	5m 20s
macos-latest w/ Node.js 22.x (1/3)	3m 6s
Big-endian debian w/ Node.js latest (${{ matrix.shard }})	0s
	2h 9m 25s

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