upgrade ember-cli

[NullVoxPopuli]

7.0.1 allows use to define blueprints with ESM (ambiguously -- which is important for minimize the type=module PR diff)

[github-actions]

📊 Size report

Tarball size — 1.2 MB → 1.2 MB

dist/dev   No changes

File	Before (Size / Brotli)	After (Size / Brotli)
Total (Includes all files)	2 MB / 478.1 kB	2 MB / 478.1 kB

---

dist/prod   No changes

File	Before (Size / Brotli)	After (Size / Brotli)
./packages/shared-chunks/api-{hash}.js	5.9 kB / 1.5 kB	40%↑8.3 kB / 21%↑1.8 kB
Total (Includes all files)	1.8 MB / 436 kB	1.8 MB / 436 kB

---

smoke-tests/v2-app-hello-world-template/dist   No changes

File	Before (Size / Brotli)	After (Size / Brotli)
Total (Includes all files)	235 kB / 64.4 kB	235 kB / 64.4 kB

_{🤖 This report was automatically generated by wyvox/pkg-size}