chore(deps): bump twikoo from 1.6.18 to 1.6.21 (#1061)

Bumps [twikoo](https://github.com/twikoojs/twikoo) from 1.6.18 to 1.6.21.
- [Release notes](https://github.com/twikoojs/twikoo/releases)
- [Changelog](https://github.com/twikoojs/twikoo/blob/main/CHANGELOG.md)
- [Commits](twikoojs/twikoo@1.6.18...1.6.21)

---
updated-dependencies:
- dependency-name: twikoo
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -40,7 +40,7 @@
     "node-fetch": "^3.3.2",
     "tablesort": "^5.3.0",
     "twemoji": "^14.0.2",
-    "twikoo": "^1.6.18",
+    "twikoo": "^1.6.21",
     "valine": "^1.5.1"
   },
   "devDependencies": {