chore(deps): bump artalk from 2.6.4 to 2.7.3

Bumps [artalk](https://github.com/ArtalkJS/Artalk/tree/HEAD/ui/artalk) from 2.6.4 to 2.7.3.
- [Release notes](https://github.com/ArtalkJS/Artalk/releases)
- [Changelog](https://github.com/ArtalkJS/Artalk/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ArtalkJS/Artalk/commits/v2.7.3/ui/artalk)

---
updated-dependencies:
- dependency-name: artalk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -30,7 +30,7 @@
   "dependencies": {
     "@waline/client": "^2.15.8",
     "aplayer": "^1.10.1",
-    "artalk": "^2.6.4",
+    "artalk": "^2.7.3",
     "atomic-algolia": "^0.3.19",
     "autocomplete.js": "^0.38.1",
     "clipboard": "^2.0.11",