'How can I make this regex relative URL extraction work in grep?

Have this string in a file and want to just extract the relative link:

<a href="/FreeCAD/FreeCAD-Bundle/releases/download/weekly-builds/FreeCAD_weekly-builds-28909-2022-05-20-conda-Linux-x86_64-py39.AppImage" rel="nofollow" data-skip-pjax>

This works in https://regexr.com/6m4vg :

/FreeCAD/[^]*AppImage

But returns nothing in grep.

grep -E '/FreeCAD/\[^]*AppImage' somefile

How can I make it work? Thanks.

Edit: source file:

wget https://github.com/FreeCAD/FreeCAD-Bundle/releases/tag/weekly-builds

Desired output:

/FreeCAD/FreeCAD-Bundle/releases/download/weekly-builds/FreeCAD_weekly-builds-28909-2022-05-20-conda-Linux-x86_64-py39.AppImage


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