Merge pull request #3642 from hilja/tracker-fetch-priority-low

Set tracker’s fetch call priority to low

src/tracker/index.js

@@ -184,6 +184,7 @@
           ...(typeof cache !== 'undefined' && { 'x-umami-cache': cache }),
         },
         credentials,
+        priority: 'low',
       });
 
       const data = await res.json();