fixed: deprecated, not recommended function (#19441)

replaced deprecated function : "unescape" => "decodeURIComponent" as per the MDN recommendation.
	https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/unescape

Author: neomax7

src/content/docs/stream/manage-video-library/using-webhooks.mdx

@@ -247,7 +247,7 @@ func main() {
 
     const getUtf8Bytes = str =>
       new Uint8Array(
-        [...unescape(encodeURIComponent(str))].map(c => c.charCodeAt(0))
+        [...decodeURIComponent(encodeURIComponent(str))].map(c => c.charCodeAt(0))
       );
 
     const keyBytes = getUtf8Bytes(key);