docs(radio): clean up demo

Author: bennypowers

elements/pf-radio/demo/pf-radio.html

@@ -1,12 +1,12 @@
-<section class='container'>
+<section class="container">
   <p> Select a title </p>
-  <div class='radio-group'>
-    <pf-radio id="title-mr" value='mr' label="Mr" name="title" checked=${false}></pf-radio>
-    <pf-radio id="title-miss" value='miss' label="Miss" name="title" checked=${false}></pf-radio>
-    <pf-radio id="title-mrs" value='mrs' label="Mrs" name="title" checked=${false}></pf-radio>
-    <pf-radio id="title-ms" value='ms' label="Ms" name="title" checked=${false}></pf-radio>
-    <pf-radio id="title-dr" value='dr' label="Dr" name="title" checked=${false}></pf-radio>
-    <pf-radio id="title-other" value='other' label="Other" name="title" checked=${false}></pf-radio>
+  <div class="radio-group">
+    <pf-radio id="title-mr" value="mr" label="Mr" name="title"></pf-radio>
+    <pf-radio id="title-miss" value="miss" label="Miss" name="title"></pf-radio>
+    <pf-radio id="title-mrs" value="mrs" label="Mrs" name="title"></pf-radio>
+    <pf-radio id="title-ms" value="ms" label="Ms" name="title"></pf-radio>
+    <pf-radio id="title-dr" value="dr" label="Dr" name="title"></pf-radio>
+    <pf-radio id="title-other" value="other" label="Other" name="title"></pf-radio>
   </div>
   <pf-button> Submit</pf-button>
 </section>