Fix program card for smaller screens like ipad.

Text was overflowing from card on screens containing resolution
between 768 to 810 pixels.

PROD-748

lms/static/sass/elements/_program-card.scss

@@ -136,7 +136,7 @@
       }
 
       margin-top: -8px;
-      font-size: 1em;
+      font-size: 0.9375em;
       font-family: $font-family-sans-serif;
     }