Add v1.22 release notes (SAP#2721)

* Add v1.22 release notes

* Update blog/2022-05-20-release-notes.md

Co-authored-by: Uliana Caceres <[email protected]>

* Update 2022-05-20-release-notes.md

Co-authored-by: Uliana Caceres <[email protected]>

blog/2022-05-20-release-notes.md

@@ -0,0 +1,28 @@
+---
+title: Luigi v1.22.0
+seoMetaDescription: Release notes for Luigi v1.22.0
+author:
+  - Aleksandra Simeonova
+layout: blog
+---
+
+You can read about the new features in Luigi v1.22.0 in the release notes below.
+
+<!-- Excerpt -->
+
+
+#### Update to Fundamental Styles v0.23.0
+
+With the new release, we updated Luigi Core to version 0.23.0 of Fundamental Styles. You can read about all changes in the [release notes](https://github.com/SAP/fundamental-styles/releases/tag/v0.23.0). This update brought breaking changes and was described in the [Fundamental Library blog post](https://blogs.sap.com/2022/04/14/fundamental-library-styles-update/). You can also review the Luigi changes [here](https://github.com/SAP/luigi/pull/2698). 
+
+#### Disable keyboard accessibility on all elements outside drawers and modals
+
+When a drawer, modal, or confirmation modal is opened, keyboard actions outside of them are now disabled. Pressing TAB key will no longer select elements in the background that are not part of the modal/drawer. For more information, see the Luigi issues [2411](https://github.com/SAP/luigi/issues/2411) and [2690](https://github.com/SAP/luigi/issues/2690).
+
+#### Add functionality for allow attribute to be separated by semicolons
+
+Luigi [allowRules](https://docs.luigi-project.io/docs/general-settings/?section=allowrules) now follow the [Feature Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Feature_Policy) convention and allow the attributes to be separated by semicolons. You can find more information [here](https://github.com/SAP/luigi/pull/2642). 
+
+#### Bugfixes
+
+For a full list of bugfixes, see the [GitHub release page](https://github.com/SAP/luigi/releases/tag/v1.22.0).