Update dependency ember-template-lint to v4.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-template-lint	4.14.0 -> 4.15.0

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Release Notes

ember-template-lint/ember-template-lint

### [`v4.15.0`](https://togithub.com/ember-template-lint/ember-template-lint/blob/HEAD/CHANGELOG.md#v4150-2022-10-10) [Compare Source](https://togithub.com/ember-template-lint/ember-template-lint/compare/v4.14.0...v4.15.0) ##### :rocket: Enhancement - [#​2629](https://togithub.com/ember-template-lint/ember-template-lint/pull/2629) Add autofixer to `simple-unless` rule for simplest case ([@​godric3](https://togithub.com/godric3)) ##### :house: Internal - [#​2607](https://togithub.com/ember-template-lint/ember-template-lint/pull/2607) Add eslint-plugin-jest ([@​bmish](https://togithub.com/bmish)) ##### Committers: 2 - Andrzej Żak ([@​godric3](https://togithub.com/godric3)) - Bryan Mishkin ([@​bmish](https://togithub.com/bmish))

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