Mention how to apply xattr to downloaded GraalVM

Normally I set GRAALVM_HOME to my downloaded GraalVM installation which currently looks like: /Users/borkdude/Downloads/graalvm-ce-java11-21.2.0/Contents/Home. Since Big Sur I need to apply sudo xattr -r -d com.apple.quarantine to the GraalVM installation to remove the quarantine attribute. But this does not work when you pass include Contents/Home: pass the part without it, like:

sudo xattr -r -d com.apple.quarantine $GRAALVM_HOME/../..

or

sudo xattr -r -d com.apple.quarantine /Users/borkdude/Downloads/graalvm-ce-java11-21.2.0/Contents/Home

[borkdude]

Actually the above is wrong, you should (according to a GraalVM slack user):

xattr -c download.file.tar.gz"

and then extract the file.

[sogaiu]

Nice find!