Bump aws-cdk from 2.171.1 to 2.173.4 in /pipelines

Bumps [aws-cdk](https://github.com/aws/aws-cdk/tree/HEAD/packages/aws-cdk) from 2.171.1 to 2.173.4.
- [Release notes](https://github.com/aws/aws-cdk/releases)
- [Changelog](https://github.com/aws/aws-cdk/blob/main/CHANGELOG.v2.md)
- [Commits](https://github.com/aws/aws-cdk/commits/v2.173.4/packages/aws-cdk)

---
updated-dependencies:
- dependency-name: aws-cdk
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pipelines/package-lock.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "@types/node": "^22.10.1",
     "typescript": "^5.7.2",
-    "aws-cdk": "^2.171.1"
+    "aws-cdk": "^2.173.4"
   },
   "dependencies": {
     "aws-cdk-lib": "^2.171.1",