docs: add disclaimer

chingor13 · chingor13 · commit fb6f2e8b9b14 · 2023-02-13T16:42:17.000-08:00
diff --git a/README.md b/README.md
@@ -63,3 +63,7 @@ sure that the token provided has `write:repo_hook` and `public_repo` scopes.
 
 If you need to change the GitHub API token associated with releasetool, run `releasetool reset-config`. This will delete the existing token. The next time you run `releasetool start` you will be
 prompted to enter a new token.
+
+## Disclaimer
+
+This is not an official Google product.
