doc(nodejs): update upgrade.md

bindings/nodejs/upgrade.md

@@ -1,3 +1,33 @@
+# Unreleased
+
+## Breaking change
+
+### Public API
+
+Now, the `append` operation has been removed. You can use below code instead.
+
+```js
+op.write("path/to/file", Buffer.from("hello world"), { append: true });
+```
+
+## New features
+
+### Public API
+
+Now, `write`, `writeSync`, `writer`, and `writerSync` operations support  `WriteOptions` as optional third argument.
+
+```ts
+export interface WriteOptions {
+  append?: boolean
+  chunk?: bigint
+  contentType?: string
+  contentDisposition?: string
+  cacheControl?: string
+}
+// Example
+op.write("path/to/file", Buffer.from("hello world"), { contentType: "text/plain" });
+```
+
 # Upgrade to v0.44
 
 ## Breaking change