fix: broken img/a

Signed-off-by: Kai Xu <xuk@ibm.com>

Author: xukai92

_tabs/about.html

@@ -146,7 +146,7 @@ <h3 class="h6">
     <div class="col-md-3 text-center mb-4">
       <img class="rounded-circle mb-3" width="128" height="128" src="/assets/img/about/kaveh.jpeg" alt="Picture of Kaveh Alimohammadi">
       <h3 class="h6">
-        <a href="Kaveh Alimohammadi" target="_blank">Kaveh Alimohammadi</a>, MIT
+        <a href="https://kavehalim.github.io" target="_blank">Kaveh Alimohammadi</a>, MIT
       </h3>
     </div>
 

index.html

@@ -5,6 +5,8 @@
 
 {% include lang.html %}
 
+
+
 {% assign all_pinned = site.posts | where: 'pin', 'true' %}
 {% assign all_normal = site.posts | where_exp: 'item', 'item.pin != true and item.hidden != true' %}
 
@@ -162,7 +164,7 @@ <h1 class="card-title my-2 mt-md-0">{{ post.title }}</h1>
 
 <div class="flex-grow-1 px-xl-1">
   <h2>InstructLab</h2>
-  <img src="assets/img/home/pipeline.png">
+  <img src="assets/img/home/pipeline.png" alt="diagram showing the InstructLab pipeline">
 
   <h3>What is InstructLab?</h3>
   <p>