fix(compass-workspaces): missing free_storage_size in test mock method

Author: ivandevp

packages/compass-workspaces/src/index.spec.tsx

@@ -103,6 +103,7 @@ describe('WorkspacesPlugin', function () {
                   document_count: 0,
                   index_count: 0,
                   storage_size: 0,
+                  free_storage_size: 0,
                   data_size: 0,
                   index_size: 0,
                 },