add more examples repo (#94)

and update URLs for packages that use DemoCards 0.2

Author: johnnychen94

README.md

@@ -54,7 +54,7 @@ The use of this package heavily relies on [Documenter.jl](https://github.com/Jul
 [Literate.jl](https://github.com/fredrikekre/Literate.jl), [Mustache.jl](https://github.com/jverzani/Mustache.jl)
 and others. Unfortunately, I'm not a contributor of any. This package also uses a lot of Regex, which I know little.
 
-The initial purpose of this package is to set up the [demo page](https://juliaimages.org/latest/democards/examples) of JuliaImages.
+The initial purpose of this package is to set up the [demo page](https://juliaimages.org/latest/examples) of JuliaImages.
 I'm not sure how broadly this package suits the need of others, but I'd like to accept any issues/PRs on improving the usage experience.
 
 

docs/src/index.md

@@ -21,5 +21,7 @@ generate demos and associated assets for you.
 
 ## Usage Examples
 
-* [Images](https://juliaimages.org/latest/democards/examples/)
-* [Augmentor](https://evizero.github.io/Augmentor.jl/dev/democards/operations/)
+* [Augmentor.jl](https://evizero.github.io/Augmentor.jl/dev/operations/)
+* [Images.jl](https://juliaimages.org/latest/examples/)
+* [ReinforcementLearning.jl](https://juliareinforcementlearning.org/docs/experiments/)
+* [LeetCode.jl](https://cn.julialang.org/LeetCode.jl/dev/)