chore(deps): bump date-holidays in /.github/workflows/holiday-generator (#1018)

Bumps [date-holidays](https://github.com/commenthol/date-holidays) from 3.26.7 to 3.26.8.
- [Changelog](https://github.com/commenthol/date-holidays/blob/master/CHANGELOG.md)
- [Commits](https://github.com/commenthol/date-holidays/compare/v3.26.7...v3.26.8)

---
updated-dependencies:
- dependency-name: date-holidays
  dependency-version: 3.26.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

@@ -71,9 +71,9 @@
       }
     },
     "node_modules/date-holidays": {
-      "version": "3.26.7",
-      "resolved": "https://registry.npmjs.org/date-holidays/-/date-holidays-3.26.7.tgz",
-      "integrity": "sha512-rA0LLBgd+FDveUVwmyvlt9YItRCcbpEM6dlyt6V1QfTZ+HHroknagyqBrvDNA0BGj/S1iWylKEKAjpovpxNIeA==",
+      "version": "3.26.8",
+      "resolved": "https://registry.npmjs.org/date-holidays/-/date-holidays-3.26.8.tgz",
+      "integrity": "sha512-vwCa+2l+TQzB5hjPhle/OcmhU8NrPGuZvmcirm/Hn6aYIrWYatQG+a8GLHDR2MdTxzWWzcz7HXvD6fKtwXOHOQ==",
       "license": "(ISC AND CC-BY-3.0)",
       "dependencies": {
         "date-holidays-parser": "^3.4.7",