Bump luxon from 1.27.0 to 1.28.1 in /notebooker/web/static

Bumps [luxon](https://github.com/moment/luxon) from 1.27.0 to 1.28.1.
- [Release notes](https://github.com/moment/luxon/releases)
- [Changelog](https://github.com/moment/luxon/blob/master/CHANGELOG.md)
- [Commits](moment/luxon@1.27.0...1.28.1)

---
updated-dependencies:
- dependency-name: luxon
  dependency-type: indirect
...

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

Author: dependabot[bot]

notebooker/web/static/yarn.lock

@@ -3165,8 +3165,9 @@ lru-cache@^4.1.5:
     yallist "^2.1.2"
 
 luxon@^1.26.0:
-  version "1.27.0"
-  resolved "https://registry.yarnpkg.com/luxon/-/luxon-1.27.0.tgz#ae10c69113d85dab8f15f5e8390d0cbeddf4f00f"
+  version "1.28.1"
+  resolved "https://registry.yarnpkg.com/luxon/-/luxon-1.28.1.tgz#528cdf3624a54506d710290a2341aa8e6e6c61b0"
+  integrity sha512-gYHAa180mKrNIUJCbwpmD0aTu9kV0dREDrwNnuyFAsO1Wt0EVYSZelPnJlbj9HplzXX/YWXHFTL45kvZ53M0pw==
 
 macos-release@^2.2.0:
   version "2.3.0"