fix: slurm system config (#702)

## Description
imports are wrong in this file after the systems config refactor

***As a contributor to the Anemoi framework, please ensure that your
changes include unit tests, updates to any affected dependencies and
documentation, and have been tested in a parallel setting (i.e., with
multiple GPUs). As a reviewer, you are also responsible for verifying
these aspects and requesting changes if they are not adequately
addressed. For guidelines about those please refer to
https://anemoi.readthedocs.io/en/latest/***

By opening this pull request, I affirm that all authors agree to the
[Contributor License
Agreement.](https://github.com/ecmwf/codex/blob/main/Legal/contributor_license_agreement.md)

Author: cathalobrien

training/src/anemoi/training/config/system/slurm.yaml

@@ -1,5 +1,5 @@
 ---
 defaults:
-  - storage: example
-  - files: example
+  - output: example
+  - input: example
   - hardware: slurm