Bump notebook from 6.4.1 to 6.4.12 in /examples/research_projects/lxmert#6

dependabot[bot] wants to merge 1 commit intomainmicrosoft/AdaMix:mainfrom

dependabot/pip/examples/research_projects/lxmert/notebook-6.4.12microsoft/AdaMix:dependabot/pip/examples/research_projects/lxmert/notebook-6.4.12Copy head branch name to clipboard