Update README.md to point to 1.0 docs

README.md

@@ -61,4 +61,4 @@ Extensions provided in other repositories include
 
 ## Documentation
 
-You can find reference documentation and user guides for Hummingbird [here](https://hummingbird-project.github.io/hummingbird-docs/documentation/hummingbird/). The [hummingbird-examples](https://github.com/hummingbird-project/hummingbird-examples) repository has a number of examples of different uses of the library.
+You can find reference documentation and user guides for Hummingbird [here](https://hummingbird-project.github.io/hummingbird-docs/1.0/documentation/hummingbird/). The [hummingbird-examples](https://github.com/hummingbird-project/hummingbird-examples) repository has a number of examples of different uses of the library.