Update the browser#1097 release notes

The API has changed so that it requires working with the experimental
fs module to upload files from the local file system.

release notes/v0.50.0.md

@@ -13,9 +13,9 @@ k6 `v0.50.0` is here 🎉! This release includes:
 
 ## New features
 
-### Add support for uploading files from the browser module [browser#1097](https://github.com/grafana/xk6-browser/pull/1097)
+### Add support for uploading files from the browser module [browser#1097](https://github.com/grafana/xk6-browser/pull/1097), [browser#1244](https://github.com/grafana/xk6-browser/pull/1244)
 
-You can now upload files using the available input forms on the website under test. The new API is `setInputFiles` which can be called from a `page`, `frame` or `elementHandle` types. It can upload one or more files from the local filesystem, or one or more files encoded in the test script, or a combination of both files from the filesystem and from within the test script.
+You can now upload files using the available input forms on the website under test. The new API is `setInputFiles` which can be called from a `page`, `frame` or `elementHandle` types. It can upload one or more files encoded in the test script. To upload files from the local file system, work with the [experimental fs module](https://grafana.com/docs/k6/latest/javascript-api/k6-experimental/fs/).
 
 <details>
 <summary>Expand to see the examples.</summary>
@@ -35,26 +35,7 @@ For the following examples, we will use the HTML file:
 </html>
 ```
 
-Uploading a file from the local filesystem can be achieved with the following script:
-
-```js
-export default async function () {
-  const page = browser.newPage();
-
-  await page.goto(url)
-
-  // Set the path relative to the current working directory.
-  page.setInputFiles('input[id="upload"]', 'test.txt')
-
-  // Click on the submit button on the form to upload the file.
-  const submitButton = page.locator('input[type="submit"]')
-  await Promise.all([page.waitForNavigation(), submitButton.click()])
-
-  page.close();
-}
-```
-
-Uploading a file that is encoded in the test script can be achieved with the following script:
+Uploading a file can be achieved with the following script:
 
 ```js
 // Import the k6 encoder module.
@@ -78,26 +59,12 @@ export default async function () {
 
 Uploading multiple files can be done with the use of an array:
 
-```js
-page.setInputFiles('input[id="upload"]', ['test.txt', 'test.json'])
-```
-
-or
-
 ```js
 page.setInputFiles('input[id="upload"]',
     [{ name: 'test.txt', mimetype: 'text/plain', buffer: encoding.b64encode('Hello World') },
     { name: 'test.json', mimetype: 'text/json', buffer: encoding.b64encode('{"message": "Hello World"}') }])
 ```
 
-And can be a combination of both:
-
-```js
-page.setInputFiles('input[id="upload"]',
-    ['test.txt',
-    { name: 'test.json', mimetype: 'text/json', buffer: encoding.b64encode('{"message": "Hello World"}') }])
-```
-
 </details>
 
 Thanks to @bandorko! :bow: :tada: