Merge pull request #354 from nypublicradio/mwalsh/smaller-header

FE-136 Use smaller hero image on desktop

app/components/centennial/centennial-header/template.hbs

@@ -1,7 +1,7 @@
 <div class="centennial-header">
     <h1 class="centennial-header_heading">
     <picture div class="centennial-header__hero">
-        <source src="{{staticAssetPath}}img/100/hero-image-desktop-x1.jpg" srcset="{{staticAssetPath}}img/100/hero-image-desktop-x1.jpg 1224w, {{staticAssetPath}}img/100/hero-image-desktop-x2.jpg 2448w, {{staticAssetPath}}img/100/hero-image-desktop-x3.jpg 3672w" media="(min-width: 1025px)">
+        <source src="{{staticAssetPath}}img/100/hero-image-desktop-slim-x1.jpg" srcset="{{staticAssetPath}}img/100/hero-image-desktop-slim-x1.jpg 1224w, {{staticAssetPath}}img/100/hero-image-desktop-slim-x2.jpg 2448w, {{staticAssetPath}}img/100/hero-image-desktop-slim-x3.jpg 3672w" media="(min-width: 1025px)">
         <img src="{{staticAssetPath}}img/100/hero-image-responsive-x1.jpg" srcset="{{staticAssetPath}}img/100/hero-image-responsive-x1.jpg 375w, {{staticAssetPath}}img/100/hero-image-responsive-x2.jpg 750w, {{staticAssetPath}}img/100/hero-image-responsive-x3.jpg 1125w" alt="A Century of the New York Conversation">
     </picture>
     </h1>