Update jquery to 3.5.1

We don't really need to use the same version as the Strava website, so
use a version that isn't known to be insecure so that we pass Mozilla's
automated review.

Author: liskin

Diff for: 3rd/jquery-3.5.1.min.js

@@ -35,7 +35,7 @@
 
 	const loadJQuery = () => window.jQuery
 		? Promise.resolve(null)
-		: getScript(getURL('3rd/jquery.min.js')).then(() => jQuery.noConflict());
+		: getScript(getURL('3rd/jquery-3.5.1.min.js')).then(() => jQuery.noConflict());
 	const loadGoogleMaps = () => document.querySelector('script[src*="//maps.google.com/maps/api/js"]')
 		? Promise.resolve(null)
 		: ignoreError(getScript('https://maps.google.com/maps/api/js?sensor=true&client=gme-stravainc1'));

Diff for: 3rd/jquery.min.js

@@ -22,7 +22,7 @@
   ],
   "web_accessible_resources": [
     "3rd/Leaflet.GoogleMutant.js",
-    "3rd/jquery.min.js",
+    "3rd/jquery-3.5.1.min.js",
     "3rd/leaflet-pegman.min.css",
     "3rd/leaflet-pegman.min.js",
     "arrive.min.js",