Update docs link to point to datadoghq.dev (#124)

Author: nmuesch

setup.cfg

@@ -28,7 +28,7 @@ classifiers=
     Programming Language :: Python :: 3.8
 project_urls =
     Bug Tracker = https://github.com/DataDog/datadog-api-client-python/issues
-    Documentation = https://datadog-api-client-python.readthedocs.io/en/latest/
+    Documentation = https://datadoghq.dev/datadog-api-client-python/
     Source Code = https://github.com/DataDog/datadog-api-client-python
 
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