fixup! release: add Mac OSX installer build

We configure the build using a `config.mak` file for better
debuggability, which means that we also need to copy the `config.mak`
file to the build directory within `payload/` so that the (re-)build
(`make ... payload`) works correctly.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

.github/workflows/build-git-installers.yml

@@ -437,6 +437,7 @@ jobs:
           tar -xvf git/git-manpages-$VERSION.tar.gz -C manpages
 
           # Lay out payload
+          cp git/config.mak payload/git-$VERSION/config.mak
           make -C git/.github/macos-installer V=1 payload
 
           # Codesign payload