Add link to EAP blog post and 2x img on In progress pages

apps/demos/Demos/Scheduler/ToolbarCustomization/description.md

@@ -2,6 +2,8 @@ In our upcoming major release (v25.1) the DevExtreme Scheduler will include a cu
 
 For instance, in the screenshot, our new toolbar includes two custom buttons: "Today" and "New event".  
 
+We published the DevExtreme v25.1 EAP build with an early preview of this component. For more information, refer to [our blog post](https://community.devexpress.com/Blogs/javascript/archive/2025/04/21/devextreme-early-access-preview-v25-1.aspx).
+
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 Configuration options will include:  

apps/demos/Demos/Stepper/Overview/description.md

@@ -1,4 +1,7 @@
 Our upcoming major release (v25.1) will introduce a Stepper component designed to describe/detail progress as users navigate through a defined sequence. 
+
+We published the DevExtreme v25.1 EAP build with an early preview of this component. For more information, refer to [our blog post](https://community.devexpress.com/Blogs/javascript/archive/2025/04/21/devextreme-early-access-preview-v25-1.aspx).
+
 <!--split-->
 Stepper will work especially well for multi-step processes like filling forms, onboarding flows, or wizards.