Update github_rest_api/github.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: dclong

github_rest_api/github.py

@@ -506,6 +506,10 @@ def create_or_update_secret(
             raise ValueError("A string value is required for `name`.")
         if not isinstance(value, str):
             raise ValueError("A string value is required for `value`.")
+        if visibility not in ("all", "private", "selected"):
+            raise ValueError("`visibility` must be one of 'all', 'private', or 'selected'.")
+        if selected_repository_ids and visibility != "selected":
+            raise ValueError("`selected_repository_ids` can only be provided when `visibility` is 'selected'.")
         key = self.get_secret_public_key()
         json: dict[str, Any] = {
             "encrypted_value": _encrypt_secret(key["key"], value),