Bump azure-devops-ui from 2.251.0 to 2.255.0

Bumps [azure-devops-ui](https://github.com/Microsoft/azure-devops-ui-public) from 2.251.0 to 2.255.0.
- [Commits](https://github.com/Microsoft/azure-devops-ui-public/commits)

---
updated-dependencies:
- dependency-name: azure-devops-ui
  dependency-version: 2.255.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "@microsoft/applicationinsights-web": "^3.3.6",
     "azure-devops-extension-api": "^4.246.0",
     "azure-devops-extension-sdk": "^4.0.2",
-    "azure-devops-ui": "^2.251.0",
+    "azure-devops-ui": "^2.255.0",
     "react": "^17.0.1",
     "react-dom": "^17.0.1"
   },