Update registry1.dso.mil/ironbank/opensource/nginx/nginx-alpine Docker tag to v1.26.1

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/opensource/nginx/nginx-alpine	ironbank-base	patch	1.26.0 -> 1.26.1
registry1.dso.mil/ironbank/opensource/nginx/nginx-alpine	stage	patch	1.26.0 -> 1.26.1

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