Fix typo: Fotran -> Fortran

Author: msakai

README.md

@@ -10,7 +10,7 @@ Formura = Formula Translator - Translator + RA (Reserach Assistant)
 
 - Also c.f. [The paper](https://github.com/nushio3/formura/blob/master/reference/muranushi%2B-fhpc2016.pdf) and [The slides](https://github.com/nushio3/formura/blob/master/reference/slides-fhpc2016.pdf) on Formura @ FHPC2016.
 
-In Formura, you can describe stencil computations just as if you would write the discretized formulae in the papers, without even translating them into Fotran.
+In Formura, you can describe stencil computations just as if you would write the discretized formulae in the papers, without even translating them into Fortran.
 
 The syntax of Formura is kept simple, so that you can easily learn and write simple Formura programs, and you can generate more complex Formura programs from your favorite programming languages.