Fix minor lint HTML issue.

fat-tire · fat-tire · commit 56659d8f970b · 2019-01-23T21:56:13.000-08:00
diff --git a/_layouts/default.html b/_layouts/default.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="{{ site.lang | default: "en-US" }}">
+<html lang="{{ site.lang | default: 'en-US' }}">
   <head>
     <meta charset="UTF-8">
 
