fix typo in relationships.md doc (#2059)

Co-authored-by: Iris Benoît <iris.benoit@pix.fr>
Co-authored-by: Jérémie Jadé <jeremie.jade@pix.fr>
Co-authored-by: Nicolas Lepage <nicolas.lepage@pix.fr>
Co-authored-by: Guillaume Lagorce <guillaume.lagorce@pix.fr>
Co-authored-by: Fael Bassetti <fael.bassetti@pix.fr>

guides/release/models/relationships.md

@@ -468,7 +468,7 @@ It is also possible to remove a record from a `hasMany` relationship:
 let blogPost = this.store.peekRecord('blog-post', 1);
 let commentToRemove = this.store.peekRecord('comment', 1);
 let comments = await blogPost.comments;
-blockPost.comments = comments.filter((comment) => comment !== commentToRemove);
+blogPost.comments = comments.filter((comment) => comment !== commentToRemove);
 blogPost.save();
 ```