Fix issues based on comments

Author: achen178

app/assets/stylesheets/marketing_redesign/components/_section.css

@@ -4,7 +4,6 @@
   gap: var(--space--base);
   grid-template-columns: repeat(12, [col-start] 1fr);
   justify-content: center;
-  justify-content: center;
   padding: var(--space--large) 0;
 }
 

app/views/marketing_redesign/about/show.html.erb

@@ -1,7 +1,7 @@
 <%= content_for(:page_title, t(".page_title")) %>
 <section class="section about-us">
   <div class="image-crop">
-    <%= image_tag "marketing_redesign/man-learning-from-home.jpg", alt: "Man wearing a blue cap and green jacket sits at a table and uses a laptop, with a red mug in front of him in a well-lit room."%>
+    <%= image_tag "marketing_redesign/man-learning-from-home.jpg", alt: "Person wearing a blue cap and green jacket sits at a table and uses a laptop, with a red mug in front of them in a well-lit room."%>
   </div>
   <div class="about-content">
     <h1><%= t(".section_title") %></h1>