Merge pull request #505 from ViralBShah/patch-1

Update README.md

Author: ChrisRackauckas

README.md

@@ -1,7 +1,7 @@
 ![CI](https://github.com/JuliaDiff/ForwardDiff.jl/workflows/CI/badge.svg) [![Coverage Status](https://coveralls.io/repos/JuliaDiff/ForwardDiff.jl/badge.svg?branch=master&service=github)](https://coveralls.io/github/JuliaDiff/ForwardDiff.jl?branch=master)
 
-[![](https://img.shields.io/badge/docs-stable-blue.svg)](http://www.juliadiff.org/ForwardDiff.jl/stable)
-[![](https://img.shields.io/badge/docs-latest-blue.svg)](http://www.juliadiff.org/ForwardDiff.jl/latest)
+[![](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliadiff.org/ForwardDiff.jl/stable)
+[![](https://img.shields.io/badge/docs-latest-blue.svg)](https://juliadiff.org/ForwardDiff.jl/latest)
 
 # ForwardDiff.jl