chore(deps-dev): bump tailwindcss from 3.1.5 to 3.1.6

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/master/CHANGELOG.md)
- [Commits](tailwindlabs/tailwindcss@v3.1.5...v3.1.6)

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

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

package.json

@@ -28,7 +28,7 @@
     "postcss-import": "^14.1.0",
     "snake-case": "^3.0.4",
     "standard-version": "^9.5.0",
-    "tailwindcss": "^3.1.5",
+    "tailwindcss": "^3.1.6",
     "vuepress": "^2.0.0-beta.49",
     "vuepress-plugin-sitemap2": "^2.0.0-beta.24",
     "yaml": "^2.1.1"