Update dependency ember-source to v5.9.0 (#608)

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

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
     "ember-page-title": "8.2.3",
     "ember-qunit": "8.0.2",
     "ember-resolver": "11.0.1",
-    "ember-source": "5.8.0",
+    "ember-source": "5.9.0",
     "ember-source-channel-url": "3.0.0",
     "ember-template-lint": "6.0.0",
     "ember-try": "3.0.0",