- update README

Signed-off-by: SSE4 <[email protected]>

README.md

@@ -39,6 +39,22 @@ These are the hooks currently available in this repository
 This hook checks that some important attributes are present in the ``ConanFile``: url, 
 license and description, and will output a warning for the missing ones. 
 
+### [GitHub Update](plugins/github-updater.py)
+
+This Conan hook reads your recipe and updates its GitHub repository properties using the attributes.
+
+The following attributes are updated:
+
+- homepage
+
+- description
+
+- topics
+
+It's necessary to pass GitHub token by environment variable: *GITHUB_TOKEN*.
+
+The hook is automatically called when *export* command is executed.
+
 ## License
 
 [MIT License](LICENSE)