pick ember-data 4.12 and ember 5.12

Author: ef4

package.json

@@ -73,7 +73,7 @@
     "ember-cli-netlify": "^0.4.1",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-terser": "^4.0.2",
-    "ember-data": "~5.3.9",
+    "ember-data": "~4.12.0",
     "ember-dictionary": "^0.2.6",
     "ember-fetch": "^8.1.2",
     "ember-load-initializers": "^2.1.2",
@@ -82,7 +82,7 @@
     "ember-page-title": "^8.2.3",
     "ember-qunit": "^8.1.1",
     "ember-resolver": "^12.0.1",
-    "ember-source": "~6.0.0",
+    "ember-source": "~5.12.0",
     "ember-test-selectors": "^6.0.0",
     "eslint": "^8.57.1",
     "eslint-config-airbnb-base": "^14.2.1",