Update registry1.dso.mil/ironbank/opensource/nodejs/nodejs16 Docker tag to v16.20.0

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/opensource/nodejs/nodejs16	ironbank-base	minor	16.19.1 -> 16.20.0
registry1.dso.mil/ironbank/opensource/nodejs/nodejs16		minor	16.19.1 -> 16.20.0
registry1.dso.mil/ironbank/opensource/nodejs/nodejs16	final	minor	16.19.1 -> 16.20.0

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