chore(deps-dev): bump ember-template-lint from 1.12.2 to 1.12.3

Bumps [ember-template-lint](https://github.com/ember-template-lint/ember-template-lint) from 1.12.2 to 1.12.3.
- [Release notes](https://github.com/ember-template-lint/ember-template-lint/releases)
- [Changelog](https://github.com/ember-template-lint/ember-template-lint/blob/master/CHANGELOG.md)
- [Commits](ember-template-lint/ember-template-lint@v1.12.2...v1.12.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -3882,9 +3882,9 @@ ember-source@~3.15.0:
     silent-error "^1.1.1"
 
 ember-template-lint@^1.0.0-beta.6:
-  version "1.12.2"
-  resolved "https://registry.yarnpkg.com/ember-template-lint/-/ember-template-lint-1.12.2.tgz#09143197be2a20778d29f5f912d39b472f26a47f"
-  integrity sha512-scf7lzIArLaFt5bq3tmC+BP9vywzct4Z0ttSTtrIR9CZeCBoEUFudNlc1aDqp++fM94LcEEHkmEzKnDUStXJZQ==
+  version "1.12.3"
+  resolved "https://registry.yarnpkg.com/ember-template-lint/-/ember-template-lint-1.12.3.tgz#6e494c181ed316b61573f8664c515fe95d885d70"
+  integrity sha512-r7qlLYeXI5BTOPd2TZfgHudd4IAmYNjLnKd3PisPvvFX+OvbSd+oKakxC7CDFgIJNocIT0ky9xnMO++rynzduw==
   dependencies:
     "@glimmer/syntax" "^0.45.0"
     chalk "^2.0.0"