Update Azure version in Index.cshtml to v7

Author: CalinL

src/webapp01/Pages/Index.cshtml

@@ -6,7 +6,7 @@
 
 <div class="card text-center">
     <div class="card-body">
-        <h5 class="card-title">.NET 💜 Azure v6</h5>
+        <h5 class="card-title">.NET 💜 Azure v7</h5>
         <p class="card-text">Learn about <a href="https://learn.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
         <p class="card-text">Visit our <a asp-page="/About">About GHAS</a> page to learn about GitHub Advanced Security features.</p>
         <p class="card-text">