docs: add v1 docs link (#6802)

Author: Lukas742

README.md

@@ -78,7 +78,7 @@ npm install @ui5/webcomponents-react @ui5/webcomponents @ui5/webcomponents-fiori
 
 ## 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.
 
 <!-- *********************************************************************** -->
 

docs/Welcome.mdx

@@ -33,6 +33,8 @@ In addition to that, UI5 Web Components for React is providing complex component
 
 We will continue to support version 1.x until **end of June 2025**, focusing on bug fixes to ensure continuity for our existing users.
 
+[V1 Release Documentation](https://sap.github.io/ui5-webcomponents-react/v1/?path=/docs/getting-started--docs)
+
 ## Getting Started
 
 ### Tutorial