feat(docs): Added a Spelling Error Caution Notice

docs/src/components/codes/SpellingCaution.jsx

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: CC-BY-NC-SA-4.0
+ */
+
+import React from "react";
+import Admonition from "@theme/Admonition";
+
+export default function SpellingCaution() {
+  return (
+    <Admonition type="caution">
+      <p>
+        Take extra notice of the spelling of the keycodes, especially the
+        shorthand spelling. Otherwise, it will result in an elusive parsing
+        error!
+      </p>
+    </Admonition>
+  );
+}
+
+SpellingCaution.propTypes = {};