Fix name conflict with name from the bunyan format.

src/routes/subscriptions.rs

@@ -13,8 +13,8 @@ pub struct FormData {
     name = "Adding a new subscriber",
     skip(form, pool),
     fields(
-        email = %form.email,
-        name = %form.name
+        subscriber_email = %form.email,
+        subscriber_name = %form.name
     )
 )]
 pub async fn subscribe(form: web::Form<FormData>, pool: web::Data<PgPool>) -> HttpResponse {