Auto merge of #4377 - Turbo87:fix-download-graph, r=locks

DownloadGraph: Fix `extra` property access

The attempted fix (e2398df) for the breakage caused by the Ember Data v4 update (072394d) caused this property path to no longer be valid. This commit should fix the issue.

Resolves #4373

Author: bors

app/components/download-graph.js

@@ -77,7 +77,7 @@ export function toChartData(data) {
     return { datasets: [] };
   }
 
-  let extra = data.content?.meta?.extra_downloads ?? [];
+  let extra = data.meta?.extra_downloads ?? [];
 
   let dates = {};
   let versions = new Map();

tests/components/download-graph-test.js

@@ -516,15 +516,13 @@ function exampleData() {
     { version: FIVE_5, date: '2020-12-27', downloads: 15_713 },
   ];
 
-  downloads.content = {
-    meta: {
-      extra_downloads: [
-        { date: '2020-12-30', downloads: 36_745 },
-        { date: '2020-12-29', downloads: 33_242 },
-        { date: '2020-12-28', downloads: 19_981 },
-        { date: '2020-12-27', downloads: 19_064 },
-      ],
-    },
+  downloads.meta = {
+    extra_downloads: [
+      { date: '2020-12-30', downloads: 36_745 },
+      { date: '2020-12-29', downloads: 33_242 },
+      { date: '2020-12-28', downloads: 19_981 },
+      { date: '2020-12-27', downloads: 19_064 },
+    ],
   };
 
   return downloads;