www/node: Update 16.4.0 -> 16.4.1

https://nodejs.org/en/blog/release/v16.4.1/

This is a security release. See
https://nodejs.org/en/blog/vulnerability/july-2021-security-releases/

Security: c174118e-1b11-11ec-9d9d-0022489ad614
MFH: 2021Q3
Sponsored by: Miles AS