build(deps): Bump @carbon/themes from 10.18.0 to 10.19.0 in /ui (#63)

Bumps [@carbon/themes](https://github.com/carbon-design-system/carbon) from 10.18.0 to 10.19.0.
- [Release notes](https://github.com/carbon-design-system/carbon/releases)
- [Commits](carbon-design-system/carbon@v10.18.0...v10.19.0)

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

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

Author: dependabot[bot]

ui/package-lock.json

@@ -79,7 +79,7 @@
     }
   },
   "dependencies": {
-    "@carbon/themes": "^10.18.0",
+    "@carbon/themes": "^10.19.0",
     "@carbon/type": "^10.16.0",
     "@ibm/plex": "^5.1.3",
     "carbon-components": "^10.20.0",