Add documentation link

Author: austind

pyproject.toml

@@ -11,7 +11,7 @@ build-backend="setuptools.build_meta"
 [project]
 name = "retryhttp"
 version = "0.2.0"
-description = "Retry commonly transient HTTP errors."
+description = "Retry potentially transient HTTP errors."
 license = {file = "LICENSE"}
 readme = "README.md"
 requires-python = ">=3.8"
@@ -65,6 +65,7 @@ docs = [
 ]
 
 [project.urls]
+Documentation = "https://retryhttp.readthedocs.io"
 Homepage = "https://github.com/austind/retryhttp"
 Repository = "https://github.com/austind/retryhttp.git"
 Issues = "https://github.com/austind/retryhttp/issues"