release: 4.1.0

[code-asher]

Checklist

• Assign to next release manager
• Close previous release milestone
• Create next release milestone
• Associate issue with next release milestone

[benz0li]

Thank you for this great release and resolving #4804. The following does not seem to be necessary any more with v4.1.0 (#4777 (comment)):

[...] one must explicitly open a folder (File > Open Folder...) before opening a Jupyter notebook.