chore(deps): bump ics in /.github/workflows/holiday-generator (#1165)

Bumps [ics](https://github.com/adamgibbons/ics) from 3.11.0 to 3.12.0.
- [Release notes](https://github.com/adamgibbons/ics/releases)
- [Commits](adamgibbons/ics@v3.11.0...v3.12.0)

---
updated-dependencies:
- dependency-name: ics
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/holiday-generator/package-lock.json

@@ -10,6 +10,6 @@
   "license": "GPL-3.0-only",
   "dependencies": {
     "date-holidays": "^3",
-    "ics": "^3.11.0"
+    "ics": "^3.12.0"
   }
 }