Prepare 7.4.1 release

[chiatt]

• If it doesn't already exist create the the x.x.x.md in releases and complete the release notes folloing the pattern of previous versions
• Update the link to the x.x.x.md release document in the README.md file
• Update beta version number in init.py
• Update version number in package.json (this should be the final version number - no 'dev/' or 'x', Example: '6.0.0')
• Ensure the archesproject/arches-dev-dependencies/ repo has a matching branch, eg stable/6.0.0
• From the dev branch create a stable branch for the release e.g. dev/6.0.x -> stable/6.0.0
• In init.py of the new, stable branch, change the version to final
• Commit your changes and push the branch to the git repo.
• Release to pypi
• Create the release tag in github following the same pattern as previous releases