Bump element-internals-polyfill from 1.1.6 to 1.1.9

Bumps [element-internals-polyfill](https://github.com/calebdwilliams/element-internals-polyfill) from 1.1.6 to 1.1.9.
- [Release notes](https://github.com/calebdwilliams/element-internals-polyfill/releases)
- [Changelog](https://github.com/calebdwilliams/element-internals-polyfill/blob/main/CHANGELOG.md)
- [Commits](https://github.com/calebdwilliams/element-internals-polyfill/compare/v1.1.6...v1.1.9)

---
updated-dependencies:
- dependency-name: element-internals-polyfill
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Umbraco.Web.UI.Client/package.json

@@ -37,7 +37,7 @@
 	},
 	"dependencies": {
 		"@umbraco-ui/uui": "^1.0.0-rc.3",
-		"element-internals-polyfill": "^1.1.6",
+		"element-internals-polyfill": "^1.1.9",
 		"lit": "^2.3.1",
 		"openapi-typescript-fetch": "^1.1.3",
 		"router-slot": "^1.5.5",