Merge [quick_mx_ac] into [development]

Updates jupyterlab packages to latest available versions; minor edits to dockerfile for removing temp files, and moving yum -> dnf commands; changes maintainers list in hardening manifest

All CVEs have approved justifications in VAT (https://vat.dso.mil/vat/container/19977?branch=quick_mx_ac)

For related issue ticket see:

#129 (closed)