Update registry1.dso.mil/ironbank/opensource/python Docker tag to v3.11.6

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/opensource/python	ironbank-base	patch	v3.11.4 -> v3.11.6
registry1.dso.mil/ironbank/opensource/python		patch	v3.11.4 -> v3.11.6
registry1.dso.mil/ironbank/opensource/python	final	patch	v3.11.4 -> v3.11.6

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