Update dependency ember-source to v6.5.0-beta.1

Author: renovate[bot]

package.json

@@ -204,7 +204,7 @@
       "@glimmer/component": "^2.0.0",
       "@glimmer/validator": ">= 0.92.0",
       "ember-repl": "6.0.0",
-      "ember-source": "6.5.0-alpha.6"
+      "ember-source": "6.5.0-beta.1"
     },
     "packageExtensions": {
       "ember-async-data": {