Simplify html header

deploy/i2p

@@ -345,6 +345,7 @@ echo "Creating nginx virtual host for http://${I2P_DOMAIN}"
   echo "        proxy_set_header X-Forward-For \$proxy_add_x_forwarded_for;";
   echo '        proxy_set_header X-Forward-Proto http;';
   echo '        proxy_set_header X-Nginx-Proxy true;';
+  echo '        proxy_set_header Upgrade-Insecure-Requests false;';
   echo '        expires epoch;';
   echo '        proxy_no_cache 1;';
   echo '        proxy_temp_file_write_size 64k;';