fix(docs): set a schema for /logout responses (#2051)
fix(docs): set a schema for /logout responses (#2051)

* this remedies an OpenAPI syntax violation resulting in a redoc-cli crash
mail-in-a-box/mailinabox,mail-in-a-box/mailinabox,mail-in-a-box/mailinabox,mail-in-a-box/mailinabox