build(deps): bump ibm-cloud-sdk-core from 5.4.8 to 5.4.9

Bumps [ibm-cloud-sdk-core](https://github.com/IBM/node-sdk-core) from 5.4.8 to 5.4.9.
- [Release notes](https://github.com/IBM/node-sdk-core/releases)
- [Changelog](https://github.com/IBM/node-sdk-core/blob/main/CHANGELOG.md)
- [Commits](IBM/node-sdk-core@v5.4.8...v5.4.9)

---
updated-dependencies:
- dependency-name: ibm-cloud-sdk-core
  dependency-version: 5.4.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
   },
   "dependencies": {
     "@types/node": "20.19.37",
-    "ibm-cloud-sdk-core": "5.4.8"
+    "ibm-cloud-sdk-core": "5.4.9"
   },
   "devDependencies": {
     "@eslint/js": "9.39.4",