Bump reffy from 17.2.0 to 17.2.1

Bumps [reffy](https://github.com/w3c/reffy) from 17.2.0 to 17.2.1.
- [Changelog](https://github.com/w3c/reffy/blob/main/CHANGELOG.md)
- [Commits](https://github.com/w3c/reffy/commits)

---
updated-dependencies:
- dependency-name: reffy
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -36,7 +36,7 @@
     "css-tree": "2.3.1",
     "flags": "0.1.3",
     "mocha": "10.7.3",
-    "reffy": "17.2.0",
+    "reffy": "17.2.1",
     "rimraf": "6.0.1",
     "strudy": "^2.2.0",
     "webidl2": "24.4.1"