docs: fix Elasticsearch query example

docs/guide/elasticsearch/elasticsearch.md

@@ -17,7 +17,7 @@ Specifies how field names are inferred from CLR property names. By default, **El
 ``` csharp
 await client.SearchAsync<User>(s => s
     .Index("users")
-    .ApplyFiltering("emailAddress = John"));
+    .ApplyFiltering("emailAddress = [email protected]"));
 ```
 
 this will make the next Elasticsearch query: