chore: bump htmlnano in /examples/openfeature_web/webapp

Bumps [htmlnano](https://github.com/posthtml/htmlnano) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/posthtml/htmlnano/releases)
- [Changelog](https://github.com/posthtml/htmlnano/blob/master/CHANGELOG.md)
- [Commits](posthtml/htmlnano@2.1.0...2.1.1)

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

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

examples/openfeature_web/webapp/package.json

@@ -39,7 +39,7 @@
     "browser-sync": "^3.0.2",
     "eslint": "^8.57.0",
     "eslint-webpack-plugin": "^4.1.0",
-    "htmlnano": "^2.1.0",
+    "htmlnano": "^2.1.1",
     "imagemin-cli": "^7.0.0",
     "node-sass": "^9.0.0",
     "npm-run-all": "^4.1.5",