recorder: add note about track type

Author: bobrippling

apps/recorder/interface.html

@@ -411,6 +411,7 @@
   // check track validity after filtering
   if (!track?.[0]?.Time) return showToast("Error in trackfile (no time or empty).", "error");
   let lastTime = 0;
+  //const trackType = ... -> `<type>${trackType}</type>`
   const gpx = `<?xml version="1.0" encoding="UTF-8"?>
 <gpx creator="Bangle.js" version="1.1" xmlns="http://www.topografix.com/GPX/1/1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd" xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1" xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3">
   <metadata><time>${track[0].Time.toISOString()}</time></metadata>