contrib: Sign and notarize all MacOS binaries

Signapple has been updated to sign individual binaries, and notarize app
bundles and binaries. When codesigning, all individual binaries will be
codesigned, and both the app bundle and individual binaries will be
notarized.

doc/release-process.md

@@ -165,7 +165,7 @@ Then open a Pull Request to the [guix.sigs repository](https://github.com/bitcoi
 In the `guix-build-${VERSION}/output/x86_64-apple-darwin` and `guix-build-${VERSION}/output/arm64-apple-darwin` directories:
 
     tar xf bitcoin-${VERSION}-${ARCH}-apple-darwin-codesigning.tar.gz
-    ./detached-sig-create.sh /path/to/codesign.p12
+    ./detached-sig-create.sh /path/to/codesign.p12 /path/to/AuthKey_foo.p8 uuid
     Enter the keychain password and authorize the signature
     signature-osx.tar.gz will be created