Improve brotliDecompress.

Fixes: Uncaught (in promise) ReferenceError: callback is not defined

Test program that should then pass:

    import zlib from 'node:zlib';
    import { promisify } from 'node:util';
    import { Buffer } from 'node:buffer';
    const brotliDecompress = promisify(zlib.brotliDecompress);

    (async () => {
      const result = await brotliDecompress(Buffer.from([0x21, 0x0c, 0x00, 0x04, 0x74, 0x65, 0x73, 0x74, 0x03]));
      console.log(result.toString()); // should print "test"
    })();

ext/node/polyfills/_brotli.js

@@ -193,8 +193,19 @@ export function brotliCompressSync(
   return Buffer.from(TypedArrayPrototypeSubarray(output, 0, len));
 }
 
-export function brotliDecompress(input) {
+export function brotliDecompress(
+  input,
+  options,
+  callback,
+) {
   const buf = toU8(input);
+
+  if (typeof options === "function") {
+    callback = options;
+    options = {};
+  }
+
+  // note: `options` argument is currently not used
   return PromisePrototypeCatch(
     PromisePrototypeThen(
       op_brotli_decompress_async(buf),