Add crossorigin to ISS position demo

www/gallery/iss_position.html

@@ -12,12 +12,12 @@
 
 <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
    integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
-   crossorigin=""/>
+   crossorigin="anonymous"/>
 
  <!-- Make sure you put this AFTER Leaflet's CSS -->
  <script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"
    integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
-   crossorigin=""></script>
+   crossorigin="anonymous"></script>
 
 <script type="text/python" src="show_source.py"></script>
 <style>
@@ -64,7 +64,8 @@ <H1>Position of the International Space Station</H1>
 # Create world map
 mymap = leaflet.map('mapid').setView([51.505, -0.09], 1)
 leaflet.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
-    'attribution': '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+    'attribution': '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
+    'crossOrigin': 'anonymous'
 }).addTo(mymap);
 
 async def show_iss_pos():