Update test snapshot

tests/components/slide_local/snapshots/test_diagnostics.ambr

@@ -19,6 +19,8 @@
       'pref_disable_new_entities': False,
       'pref_disable_polling': False,
       'source': 'user',
+      'subentries': list([
+      ]),
       'title': 'slide',
       'unique_id': '12:34:56:78:90:ab',
       'version': 1,

tests/components/sma/snapshots/test_diagnostics.ambr

@@ -21,6 +21,8 @@
       'pref_disable_new_entities': False,
       'pref_disable_polling': False,
       'source': 'import',
+      'subentries': list([
+      ]),
       'title': 'SMA Device Name',
       'unique_id': '123456789',
       'version': 1,

tests/components/velbus/snapshots/test_diagnostics.ambr

@@ -16,6 +16,8 @@
       'pref_disable_new_entities': False,
       'pref_disable_polling': False,
       'source': 'user',
+      'subentries': list([
+      ]),
       'title': 'Mock Title',
       'unique_id': None,
       'version': 2,