Merge [jlab_update_ac] into [development]

Updates jupyterlab package to version 3.4.3; updates jupyterlab-related packages to latest available versions;

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

For related merge request see:

Additionally handles issues #122 (closed) and #121 (closed) - vulnerable packages have been updated and justifications provided in VAT; jupyterlab will now be version 3.4.3 which handles the renovate request

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