ci: use the 13.2 gfortran toolchain
May resolve issues with the 12.2 toolchain being unhappy since the removal of Xcode 13.3 (the release used to build it) from CI machines.
Cc: @ryan.krattiger
May resolve issues with the 12.2 toolchain being unhappy since the removal of Xcode 13.3 (the release used to build it) from CI machines.
Cc: @ryan.krattiger