misc: fix sonarcloud html issue

Type: fix

Change-Id: I3691c310fa6336bf2c103c42bccd94c27aab4878
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
diff --git a/extras/vcl-ldpreload/test/common/nginx_welcome.html b/extras/vcl-ldpreload/test/common/nginx_welcome.html
index 2ca3b95..c385090 100644
--- a/extras/vcl-ldpreload/test/common/nginx_welcome.html
+++ b/extras/vcl-ldpreload/test/common/nginx_welcome.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en" xml:lang="en">
 <head>
 <title>Welcome to nginx!</title>
 <style>