Update nextmv/cloud/client.py

Co-authored-by: Marius Merschformann <marius.merschformann@gmail.com>

Author: sebastian-quintero

nextmv/cloud/client.py

@@ -9,8 +9,11 @@
 
 @dataclass
 class Client:
-    """Client that interacts directly with the Nextmv Cloud API. The API key
-    must be provided either in the constructor or via the NEXTMV_API_KEY"""
+    """
+    Client that interacts directly with the Nextmv Cloud API. The API key
+    must be provided either in the constructor or via the NEXTMV_API_KEY
+    environment variable.
+    """
 
     api_key: str | None = None
     """API key to use for authenticating with the Nextmv Cloud API. If not