Bump jfmengels/elm-review-unused from 1.2.2 to 1.2.3 in /review

Bumps [jfmengels/elm-review-unused](https://github.com/jfmengels/elm-review-unused) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/jfmengels/elm-review-unused/releases)
- [Changelog](https://github.com/jfmengels/elm-review-unused/blob/master/CHANGELOG.md)
- [Commits](jfmengels/elm-review-unused@1.2.2...1.2.3)

---
updated-dependencies:
- dependency-name: jfmengels/elm-review-unused
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

review/elm.json

@@ -15,7 +15,7 @@
             "jfmengels/elm-review-documentation": "2.0.4",
             "jfmengels/elm-review-simplify": "2.1.4",
             "jfmengels/elm-review-the-elm-architecture": "1.0.3",
-            "jfmengels/elm-review-unused": "1.2.2",
+            "jfmengels/elm-review-unused": "1.2.3",
             "lue-bird/elm-review-record-alias-constructor": "1.1.3",
             "sparksp/elm-review-always": "1.0.6",
             "sparksp/elm-review-camelcase": "1.1.0",