build(deps): bump add-to-calendar-button from 2.13.5 to 2.13.8

Bumps [add-to-calendar-button](https://github.com/add2cal/add-to-calendar-button) from 2.13.5 to 2.13.8.
- [Release notes](https://github.com/add2cal/add-to-calendar-button/releases)
- [Changelog](https://github.com/add2cal/add-to-calendar-button/blob/main/CHANGELOG.md)
- [Commits](add2cal/add-to-calendar-button@v2.13.5...v2.13.8)

---
updated-dependencies:
- dependency-name: add-to-calendar-button
  dependency-version: 2.13.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "@rails/activestorage": "^8.1.200",
     "@rails/ujs": "^7.1.600",
     "@stimulus-components/rails-nested-form": "^5.0.0",
-    "add-to-calendar-button": "^2.13.5",
+    "add-to-calendar-button": "^2.13.8",
     "bootstrap": "5.3.6",
     "bootstrap-datepicker": "^1.10.1",
     "bootstrap-scss": "^5.3.8",