chore(deps): bump uikit from 3.21.5 to 3.21.6

Bumps [uikit](https://github.com/uikit/uikit) from 3.21.5 to 3.21.6.
- [Release notes](https://github.com/uikit/uikit/releases)
- [Changelog](https://github.com/uikit/uikit/blob/develop/CHANGELOG.md)
- [Commits](uikit/uikit@v3.21.5...v3.21.6)

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

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

package.json

@@ -61,7 +61,7 @@
     "ember-modifier": "^4.1.0",
     "ember-toggle": "^9.0.3",
     "ember-truth-helpers": "^4.0.3",
-    "uikit": "^3.21.5"
+    "uikit": "^3.21.6"
   },
   "devDependencies": {
     "@adfinis/eslint-config": "2.1.1",