Bump @angular/cdk from 12.2.0 to 12.2.9 in /app

Bumps [@angular/cdk](https://github.com/angular/components) from 12.2.0 to 12.2.9.
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/master/CHANGELOG.md)
- [Commits](https://github.com/angular/components/compare/12.2.0...12.2.9)

---
updated-dependencies:
- dependency-name: "@angular/cdk"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

app/package.json

@@ -14,7 +14,7 @@
     "watch": "webpack --progress --color --watch"
   },
   "dependencies": {
-    "@angular/cdk": "^12.2.0",
+    "@angular/cdk": "^12.2.9",
     "@electron/remote": "1.2.0",
     "@tabby-gang/node-pty": "^0.11.0-beta.200",
     "any-promise": "^1.3.0",