add reno

Author: g0rgamesh

releasenotes/notes/grub_timeout_values-c39b8b1a2c34a602.yaml

@@ -0,0 +1,8 @@
+---
+upgrade:
+  - |
+    Change default values for ``DIB_GRUB_TIMEOUT_STYLE`` and
+    ``DIB_GRUB_TIMEOUT``. The default value for ``DIB_GRUB_TIMEOUT_STYLE``
+    will be ``menu`` and for ``DIB_GRUB_TIMEOUT`` will be ``5``.
+    Adding ConfigDrive to ``DIB_CLOUD_INIT_DATASOURCES`` var list to fix
+    cloud-init issue.