added links and labels (#117)

* added links and labels

* Made events-container keyboard scrollable

* Improved label text

---------

Co-authored-by: Steve Goode <steve.goode@nearform.com>

Author: MariamM110

layouts/components/homepage/events.html

@@ -20,7 +20,7 @@ <h3>🗓️ Events</h3>
       </svg>
     </a>
   </span>
-  <div class="events-container">
+  <div class="events-container" tabindex="0">
     <div class="event-card-container">
       <div class="event-card">
         <p class="format-bold">

layouts/components/homepage/join.html

@@ -5,6 +5,7 @@
       class="tabs-join-radio"
       name="tabs-join"
       id="join-tab1"
+      aria-label="View scientists join information"
       checked
     />
     <div class="join-row">
@@ -54,6 +55,7 @@ <h2>Join 1 Million + people using Bioconductor</h2>
       class="tabs-join-radio"
       name="tabs-join"
       id="join-tab2"
+      aria-label="View developers join information"
     />
     <div class="join-row">
       <div class="join-content">

layouts/components/homepage/persona_info.html

@@ -185,7 +185,7 @@ <h2>Contribute to Bioconductor</h2>
   </section>
 </div>
 
-<a class="mobile-text-block container">
+<a class="mobile-text-block container" href="/help/support/">
     <div class="data-dev-logo">
       <img src="images/icons/svgs/question-mark-circle.svg" alt="question mark circle" width="28" height="28" />
       <p>Need some help? Ask our <br>community on the Bioconductor Support site!</p>