ci: Add libtool brew install for macOS CI · matthewfeickert/fastjet@2f1294d

Command ['python', '-m', 'pip', 'wheel', '/Users/runner/work/fastjet/fastjet', '--wheel-dir=/private/var/folders/n3/x0zngmn15fzg2jfkglj4ys4w0000gn/T/cibw-run-1mh3jsrl/cp312-macosx_arm64/built_wheel', '--no-deps', '-vv'] failed with code 1.

Process completed with exit code 1.

mpfr 4.2.1 is already installed and up-to-date. To reinstall 4.2.1, run: brew reinstall mpfr