chore(deps): update dependency ember-cli-htmlbars to v7 (#1154)

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

Author: renovate[bot]

packages/test-app/package.json

@@ -49,7 +49,7 @@
     "ember-cli-dependency-checker": "3.3.3",
     "ember-cli-fastboot": "4.1.5",
     "ember-cli-fastboot-testing": "0.6.2",
-    "ember-cli-htmlbars": "6.3.0",
+    "ember-cli-htmlbars": "7.0.0",
     "ember-cli-inject-live-reload": "2.1.0",
     "ember-cli-sri": "2.1.1",
     "ember-cli-terser": "4.0.2",