Merge pull request #15292 from Dawny33/patch-3

Added correct hyperlink for gfortran

README.md

@@ -256,7 +256,7 @@ Building Julia requires that the following software be installed:
 
 - **[GNU make]**                — building dependencies.
 - **[gcc & g++][gcc]** (>= 4.7) or **[Clang][clang]** (>= 3.1, Xcode 4.3.3 on OS X) — compiling and linking C, C++
-- **[gfortran][gcc]**           — compiling and linking Fortran libraries
+- **[gfortran]**                — compiling and linking Fortran libraries
 - **[git]**                     — version control and package management (version 1.7.3+ required)
 - **[perl]**                    — preprocessing of header files of libraries.
 - **[wget]**, **[curl]**, or **[fetch]** (FreeBSD) — to automatically download external libraries.
@@ -296,6 +296,7 @@ For a longer overview of Julia's dependencies, see these [slides](https://github
 [m4]:           http://www.gnu.org/software/m4
 [gcc]:          http://gcc.gnu.org
 [clang]:        http://clang.llvm.org
+[gfortran]:     https://gcc.gnu.org/fortran/
 [curl]:         http://curl.haxx.se
 [fetch]:        http://www.freebsd.org/cgi/man.cgi?fetch(1)
 [git]:          http://git-scm.com