fix: trailing commas with key

packages/autofmt/tests/samples/key.rsx

@@ -0,0 +1,9 @@
+rsx! {
+    li { key: "{link}",
+        Link { class: "py-1 px-2 {hover} {hover_bg}", to: "{link}", "{name}" }
+    }
+
+    li { key: "{link}", asd: "asd",
+        Link { class: "py-1 px-2 {hover} {hover_bg}", to: "{link}", "{name}" }
+    }
+}