Update dependency ember-source to v6.6.0 (#11610)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -109,7 +109,7 @@
     "ember-page-title": "9.0.2",
     "ember-qunit": "9.0.3",
     "ember-resolver": "13.1.1",
-    "ember-source": "6.5.0",
+    "ember-source": "6.6.0",
     "ember-svg-jar": "2.6.3",
     "ember-template-lint": "7.9.1",
     "ember-test-selectors": "7.1.0",