doc: fix documentation of FileHandle.prototype.appendFile

PR-URL: #42588
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>

doc/api/fs.md

@@ -179,9 +179,24 @@ longer be used.
 
 <!-- YAML
 added: v10.0.0
+changes:
+  - version:
+      - v15.14.0
+      - v14.18.0
+    pr-url: https://github.com/nodejs/node/pull/37490
+    description: The `data` argument supports `AsyncIterable`, `Iterable` and `Stream`.
+  - version: v14.12.0
+    pr-url: https://github.com/nodejs/node/pull/34993
+    description: The `data` parameter will stringify an object with an
+                 explicit `toString` function.
+  - version: v14.0.0
+    pr-url: https://github.com/nodejs/node/pull/31030
+    description: The `data` parameter won't coerce unsupported input to
+                 strings anymore.
 -->
 
-* `data` {string|Buffer|TypedArray|DataView}
+* `data` {string|Buffer|TypedArray|DataView|Object|AsyncIterable|Iterable
+  |Stream}
 * `options` {Object|string}
   * `encoding` {string|null} **Default:** `'utf8'`
 * Returns: {Promise} Fulfills with `undefined` upon success.