Updated ms.date

Author: sparkitect

docs/spfx/extensions/get-started/building-form-customizer.md

@@ -1,7 +1,7 @@
 ---
 title: Build your first Form customizer extension (preview)
 description: Form customizers are SharePoint Framework components giving you an option to override the form experience in a list or library level by associating the component to the used content type.
-ms.date: 06/21/2022
+ms.date: 07/21/2022
 ms.custom: scenarios:getting-started
 ---