Update dependency ember-source to v6

Author: renovate[bot]

package.json

@@ -108,7 +108,7 @@
     "ember-qunit": "8.1.1",
     "ember-resolver": "13.0.2",
     "ember-router-scroll": "4.1.2",
-    "ember-source": "5.12.0",
+    "ember-source": "6.0.0",
     "ember-svg-jar": "2.6.0",
     "ember-template-lint": "6.0.0",
     "ember-test-selectors": "7.0.0",