Bump @release-it-plugins/lerna-changelog from 6.1.0 to 7.0.0 (#1623)

Bumps [@release-it-plugins/lerna-changelog](https://github.com/release-it-plugins/lerna-changelog) from 6.1.0 to 7.0.0.
- [Release notes](https://github.com/release-it-plugins/lerna-changelog/releases)
- [Changelog](https://github.com/release-it-plugins/lerna-changelog/blob/master/CHANGELOG.md)
- [Commits](release-it-plugins/lerna-changelog@v6.1.0...v7.0.0)

---
updated-dependencies:
- dependency-name: "@release-it-plugins/lerna-changelog"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -115,7 +115,7 @@
     "@ember/test-helpers": "^3.3.1",
     "@embroider/test-setup": "^3.0.3",
     "@fullhuman/postcss-purgecss": "^4.1.3",
-    "@release-it-plugins/lerna-changelog": "^6.1.0",
+    "@release-it-plugins/lerna-changelog": "^7.0.0",
     "broccoli-asset-rev": "^3.0.0",
     "chai": "^4.5.0",
     "common-tags": "^1.8.2",