Update dependency @ember/app-tsconfig to v2 (#251)

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

Author: renovate[bot]

package.json

@@ -89,7 +89,7 @@
     "@babel/plugin-transform-typescript": "^7.28.5",
     "@babel/preset-typescript": "^7.28.5",
     "@babel/runtime": "^7.28.4",
-    "@ember/app-tsconfig": "^1.0.3",
+    "@ember/app-tsconfig": "^2.0.0",
     "@ember/library-tsconfig": "^1.1.3",
     "@ember/test-helpers": "^5.4.1",
     "@embroider/addon-dev": "^8.1.2",