replace the latest doc badge by stable

Author: johnnychen94

README.md

@@ -2,7 +2,7 @@
 
 Documentation For [JuliaImages](https://github.com/JuliaImages), the organization for image processing with Julia.
 
-[![](https://img.shields.io/badge/docs-latest-blue.svg)](https://juliaimages.org/latest/) [![Build Status](https://travis-ci.org/JuliaImages/juliaimages.github.io.svg?branch=source)](https://travis-ci.org/JuliaImages/juliaimages.github.io)
+[![](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliaimages.org/stable/) [![Build Status](https://travis-ci.org/JuliaImages/juliaimages.github.io.svg?branch=source)](https://travis-ci.org/JuliaImages/juliaimages.github.io)
 
 Note that the source files for the documentation are on the `source`
 branch; `master` is used only for deploying the generated HTML
@@ -18,4 +18,4 @@ The current procedure is as follows:
 - Build the documentation locally with `julia --project=. docs/make.jl`. Inspect it (by opening `docs/build/index.html` in a browser) to make sure all is well.
 - Commit your changes (including all new files) and submit a pull request.
 
-`DemoCards.jl` as a plugin package to [Documenter](https://github.com/JuliaDocs/Documenter.jl) is used to manage all the demos, check the [DemoCards Quickstart](https://johnnychen94.github.io/DemoCards.jl/stable/democards/quickstart/index.html) for more details.
+`DemoCards.jl` as a plugin package to [Documenter](https://github.com/JuliaDocs/Documenter.jl) is used to manage all the demos, check the [DemoCards Quickstart](https://johnnychen94.github.io/DemoCards.jl/stable/democards/quickstart/index.html) for more details.