build(deps): bump @hotwired/turbo-rails from 8.0.20 to 8.0.21

Bumps [@hotwired/turbo-rails](https://github.com/hotwired/turbo-rails) from 8.0.20 to 8.0.21.
- [Release notes](https://github.com/hotwired/turbo-rails/releases)
- [Commits](https://github.com/hotwired/turbo-rails/commits/v8.0.21)

---
updated-dependencies:
- dependency-name: "@hotwired/turbo-rails"
  dependency-version: 8.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -3,7 +3,7 @@
   "private": true,
   "dependencies": {
     "@ericblade/quagga2": "^1.12.0",
-    "@hotwired/turbo-rails": "^8.0.20",
+    "@hotwired/turbo-rails": "^8.0.21",
     "@rails/ujs": "^7.1.3-4",
     "chart.js": "^4.5.1",
     "chartkick": "^5.0.1",