add topic fortran-tutorial

[Beliavsky]

I suggest adding the topics fortran-tutorial, fortran, tutorial in the About section of https://github.com/ArkAngeL43/fortran-notes . A good site for Fortran info is https://fortran-lang.org/ .

[TotallyNotAHaxxer]

Great idea! will for sure add that, however while the fortran lang website is good for info it does not give a general background on good programming or knowlege about the language, they are older tutorials and really are just there to teach you about the language, compiler, basis, and OS installs