Merge branch 'master' into remove-web-launch-config

Author: millerds

src/taskpane/taskpane.html

@@ -26,7 +26,7 @@
         <h1 class="ms-font-su">Welcome</h1>
     </header>
     <section id="sideload-msg" class="ms-welcome__main">
-        <h2 class="ms-font-xl">Please sideload your add-in to see app body.</h2>
+        <h2 class="ms-font-xl">Please <a target="_blank" href="https://learn.microsoft.com/office/dev/add-ins/testing/test-debug-office-add-ins#sideload-an-office-add-in-for-testing">sideload</a> your add-in to see app body.</h2>
     </section>
     <main id="app-body" class="ms-welcome__main" style="display: none;">
         <h2 class="ms-font-xl"> Discover what Office Add-ins can do for you today! </h2>