ghwikipp: html_header: add a `<!DOCTYPE html>` at the start.

From 6fde926f088de754bed9c0db79369a388a1dc2ca Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Mon, 1 Jul 2024 05:37:35 +0000
Subject: [PATCH] html_header: add a `<!DOCTYPE html>` at the start.

This removes a warning in the Firefox console about wiki pages being in
"quirks mode."
---
 templates/html_header | 1 +
 1 file changed, 1 insertion(+)

diff --git a/templates/html_header b/templates/html_header
index a960ab0..b6558bf 100644
--- a/templates/html_header
+++ b/templates/html_header
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
 <html><head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
 <meta name="viewport" content="width=device-width, initial-scale=1"/>