fix language tag

2020-10-25 09:41:55 +01:00 · 2020-10-25 09:41:55 +01:00 · 30a4f47fec
--- a/_layouts/default.html
+++ b/_layouts/default.html
@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="de">
+<html lang="en">
    <head>
        <title>{{ site.title }} – {{ page.title }}</title>