chore(deps): update dependency ember-source to ~4.8.0

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "ember-page-title": "^7.0.0",
     "ember-qunit": "^5.1.4",
     "ember-resolver": "^8.0.2",
-    "ember-source": "~4.2.0",
+    "ember-source": "~4.8.0",
     "ember-source-channel-url": "^3.0.0",
     "ember-template-lint": "^4.0.0",
     "ember-try": "^2.0.0",