Update README.md

Author: ChrisRackauckas

README.md

@@ -86,7 +86,7 @@ system = PotentialNBodySystem(bodies, Dict(:gravitational => g_parameters, elect
 ```
 
 ### Custom Potential
-There exists an [example](http://docs.juliadiffeq.org/latest/models/physical.html) of simulation of an N-body system at absolutely custom potential. 
+There exists an [example](http://docs.juliadiffeq.org/dev/models/physical.html) of simulation of an N-body system at absolutely custom potential. 
 
 Here is shown how to create custom acceleration functions using tools of NBodySimulator.
 
@@ -377,4 +377,4 @@ plot(result)
 animate(result, "path_to_file.gif")
 ```
 
-Makie.jl also has a recipe for plotting results of N-body simulations. The [example](http://makie.juliaplots.org/stable/examples-meshscatter.html#Type-recipe-for-molecule-simulation-1) is presented in the documentation.
+Makie.jl also has a recipe for plotting results of N-body simulations. The [example](http://makie.juliaplots.org/stable/examples-meshscatter.html#Type-recipe-for-molecule-simulation-1) is presented in the documentation.