Add user agent string in w3m config

PeterDaveHello · PeterDaveHello · commit fbf612cc573f · 2023-09-20T00:08:21.000+08:00
diff --git a/w3mconfig b/w3mconfig
@@ -9,3 +9,4 @@ image_color green
 anchor_color cyan
 basic_color terminal
 color 1
+user_agent Mozilla/5.0 (Windows NT 10.0; rv:102.0) Gecko/20100101 Firefox/102.0
