Fix code typo in html

Author: mrmrs

docs/typography/measure/index.html

@@ -77,7 +77,7 @@ <h1 class="f5 fw4 sans-serif pt5 ttu black"><b>6rem/96px</b> at <b>30em</b></h1>
           Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy.
         </p>
         <h1 class="f5 fw4 sans-serif pt5 ttu black"><b>5rem/80px</b> at <b>30em</b></h1>
-        <p class="f1-subheadline measure-narrow lh-title mt4">
+        <p class="f-subheadline measure lh-title mt4">
           Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy.
         </p>
         <h1 class="f5 fw4 sans-serif pt5 bt b--light-gray ttu black"> <b>3rem(48px)</b> at <b>30em</b></h1>

src/templates/docs/measure/index.html

@@ -50,7 +50,7 @@ <h1 class="f5 fw4 sans-serif pt5 ttu black"><b>6rem/96px</b> at <b>30em</b></h1>
           Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy.
         </p>
         <h1 class="f5 fw4 sans-serif pt5 ttu black"><b>5rem/80px</b> at <b>30em</b></h1>
-        <p class="f1-subheadline measure-narrow lh-title mt4">
+        <p class="f-subheadline measure lh-title mt4">
           Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy.
         </p>
         <h1 class="f5 fw4 sans-serif pt5 bt b--light-gray ttu black"> <b>3rem(48px)</b> at <b>30em</b></h1>