Add shoutout for beta testing to help screen

Author: sciencewhiz

vscode-wpilib/resources/webviews/help.html

@@ -13,12 +13,16 @@ <h1>WPILib Help</h1>
 
   <p>Welcome to WPILib Help!</p>
 
-  <p>To open this window again, open the Command Palette (F1 or View->Command Palette), and select
-    <b>Open WPILib Help.</b>
-  </p>
+  <p>Thank you for beta testing the 2025 WPILib. Please see the <a
+      href="https://docs.wpilib.org/en/latest/docs/beta/beta-getting-started/welcome.html">the beta test
+      instructions</a> for the expectations for beta testing.</p>
 
   <p>For more help, see
-    <a href="https://docs.wpilib.org/en/stable">the WPILib documentation.</a>
+    <a href="https://docs.wpilib.org/en/latest">the WPILib documentation.</a>
+  </p>
+
+  <p>To open this window again, open the Command Palette (F1 or View->Command Palette), and select
+    <b>Open WPILib Help.</b>
   </p>
 
 </body>