Bump @headlessui/vue from 1.7.16 to 1.7.21

Bumps [@headlessui/vue](https://github.com/tailwindlabs/headlessui/tree/HEAD/packages/@headlessui-vue) from 1.7.16 to 1.7.21.
- [Release notes](https://github.com/tailwindlabs/headlessui/releases)
- [Changelog](https://github.com/tailwindlabs/headlessui/blob/@headlessui/vue@v1.7.21/packages/@headlessui-vue/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/headlessui/commits/@headlessui/vue@v1.7.21/packages/@headlessui-vue)

---
updated-dependencies:
- dependency-name: "@headlessui/vue"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -9,7 +9,7 @@
         "@codemirror/lang-html": "^6.4.1",
         "@formkit/icons": "^1.4.0",
         "@formkit/vue": "^1.4.0",
-        "@headlessui/vue": "^1.7.16",
+        "@headlessui/vue": "^1.7.21",
         "@heroicons/vue": "^2.0.18",
         "@inertiajs/vue3": "^1.0.11",
         "@tailwindcss/forms": "^0.5.3",