ci: update to gfortran 13.2 build
This build was made with Xcode 14.2 which is what CI is using and is therefore guaranteed to be on the CI machines.
System updates will be applied on Nov 25th between 7am and 9am, EST (UTC-05:00). This site will have intermittent downtime during that time.
This build was made with Xcode 14.2 which is what CI is using and is therefore guaranteed to be on the CI machines.