Update dependency ember-template-lint to v6 (#458)

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

Author: renovate[bot]

package.json

@@ -52,7 +52,7 @@
     "ember-qunit": "8.0.2",
     "ember-resolver": "10.1.1",
     "ember-source": "5.7.0",
-    "ember-template-lint": "5.13.0",
+    "ember-template-lint": "6.0.0",
     "ember-try": "2.0.0",
     "eslint": "8.57.0",
     "eslint-config-prettier": "9.1.0",