Use borgmatic version commands instead of deprecated hooks

data/borgmatic.d/config.yaml

@@ -27,9 +27,13 @@ checks:
   - name: data
     frequency: 1 month
 
-before_everything:
-    - echo "Starting a backup job."
-after_everything:
-    - echo "Backup created."
-on_error:
-    - echo "Error while creating a backup."
+commands:
+  - before: everything
+    run:
+      - echo "Starting a backup job."
+  - after: everything
+    run:
+      - echo "Backup created."
+  - after: error
+    run:
+      - echo "Error while creating a backup."