Update dependency ember-source to v6.3.0

Author: renovate[bot]

Diff for: package.json

@@ -110,7 +110,7 @@
     "ember-page-title": "9.0.1",
     "ember-qunit": "9.0.2",
     "ember-resolver": "13.1.0",
-    "ember-source": "6.0.1",
+    "ember-source": "6.3.0",
     "ember-svg-jar": "2.6.2",
     "ember-template-lint": "7.0.4",
     "ember-test-selectors": "7.0.0",