🐛 Fixed sending feedback on email only posts

fixes https://github.com/TryGhost/Team/issues/2220

`Post.findOne` is filtering by status 'published' by default. 'sent' isn't 'published' so we throw a 404 error when trying to send feedback to a 'sent' post.

ghost/core/core/server/services/audience-feedback/FeedbackRepository.js

@@ -62,6 +62,6 @@ module.exports = class FeedbackRepository {
     }
 
     async getPostById(id) {
-        return await this.#Post.findOne({id});
+        return await this.#Post.findOne({id, status: 'all'});
     }
 };