Fix typo in URL

Author: sethaxen

README.md

@@ -9,4 +9,4 @@
 
 This package provides utilities for loading datasets defined in the [`arviz_example_data`](https://github.com/arviz-devs/arviz_example_data) repository.
 The resulting objects are [InferenceObjects.jl](https://julia.arviz.org/InferenceObjects)'s `InferenceData`.
-These utilities are used in [ArviZ.jl](https://julia.arviz.org/ArviZ.).
+These utilities are used in [ArviZ.jl](https://julia.arviz.org/ArviZ).