docs: update EOS of v1 (#6429)

SAP/ui5-webcomponents@9358e96

Author: Lukas742

docs/Welcome.mdx

@@ -31,7 +31,7 @@ In addition to that, UI5 Web Components for React is providing complex component
 
 ## Ongoing Support for Version 1.x
 
-We will continue to support version 1.x until the end of the year, focusing on bug fixes to ensure continuity for our existing users.
+We will continue to support version 1.x until **end of June 2025**, focusing on bug fixes to ensure continuity for our existing users.
 
 ## Getting Started