Merge pull request magento-commerce/devdocs#2513

Update What's New

Author: dshevtsov

src/_data/whats-new.yml

@@ -4,8 +4,44 @@ description: This page contains recent changes that we think you'd like to know
   We exclude from this list proofreading, spelling checks, and all minor updates.
 link: "/whats-new.html"
 thread: "/whatsnew-feed.xml"
-updated: Mon Aug 30 16:00:00 2021
+updated: Tue Sep 7 21:38:19 2021
 entries:
+- description: Added a new [file upload security](https://devdocs.magento.com/guides/v2.4/extension-dev-guide/security/uploads.html)
+    topic.
+  versions: 2.3.x, 2.4.x
+  type: New Topic
+  date: September 3, 2021
+  link: https://github.com/magento-commerce/devdocs/pull/2500
+  merge_commit: 883f3b77234ad01ed752284f3f9a3559141f409e
+  contributor: AlexMaxHorkun
+  membership: true
+  labels:
+  - New Topic
+  - 2.3.x
+  - 2.4.x
+- description: An overview of [Storefront Events SDK](https://devdocs.magento.com/live-search/events.html)
+    with a summary of search-related collector functions.
+  versions: 2.4.x
+  type: New Topic
+  date: September 3, 2021
+  link: https://github.com/magento-commerce/devdocs/pull/2508
+  merge_commit: 2c5c88524c3ae63145e8bda66e10812fe94c2138
+  contributor: ccondra
+  membership: true
+  labels:
+  - New Topic
+  - 2.4.x
+- description: Updated the [Module Reference Guide](https://devdocs.magento.com/guides/v2.4/mrg/intro.html).
+  versions: 2.4.3
+  type: Major Update
+  date: September 2, 2021
+  link: https://github.com/magento-commerce/devdocs/pull/2501
+  merge_commit: 52a9f4a4bae0d5737fc719740b2e5893cc1adcc3
+  contributor: dshevtsov
+  membership: true
+  labels:
+  - Major Update
+  - 2.4.3
 - description: Added [Community quality patches release notes](https://github.com/magento/quality-patches/blob/master/community-release-notes.md)
     to a table of contents at [Commerce Quality Patches](https://devdocs.magento.com/guides/v2.4/comp-mgr/patching/mqp.html).
   versions: 2.x