Update README.md for installation on M1 processors
Update README.md for installation on M1 processors

Home-brew changed its installation location from /usr/local/ to /opt/homebrew/. Some packages search dependencies still in the old location. For them to find their dependencies two symbolic link need to be created.
goblint/analyzer,goblint/analyzer,goblint/analyzer,goblint/analyzer,goblint/analyzer