Fix null embedder test

Author: Strift

src/main/java/com/meilisearch/sdk/SettingsHandler.java

@@ -798,7 +798,7 @@ TaskInfo updateEmbedders(String uid, Map<String, Embedders> embedders)
             throws MeilisearchException {
         return httpClient.patch(
                 settingsPath(uid).addSubroute("embedders").getURL(),
-                embedders == null ? httpClient.jsonHandler.encode(embedders) : embedders,
+                embedders == null ? null : httpClient.jsonHandler.encode(embedders),
                 TaskInfo.class);
     }