chore(deps): bump luxon in /dev/coverage-action in the npm group (ietf-tools#9139)

Bumps the npm group in /dev/coverage-action with 1 update: [luxon](https://github.com/moment/luxon).


Updates `luxon` from 3.6.1 to 3.7.1
- [Changelog](https://github.com/moment/luxon/blob/master/CHANGELOG.md)
- [Commits](moment/luxon@3.6.1...3.7.1)

---
updated-dependencies:
- dependency-name: luxon
  dependency-version: 3.7.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm
...

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Author: dependabot[bot]

dev/coverage-action/package-lock.json

@@ -9,6 +9,6 @@
     "@actions/core": "1.11.1",
     "@actions/github": "6.0.1",
     "lodash": "4.17.21",
-    "luxon": "3.6.1"
+    "luxon": "3.7.1"
   }
 }