Bump @jupyterlab/apputils from 4.5.5 to 4.5.6 in /js

---
updated-dependencies:
- dependency-name: "@jupyterlab/apputils"
  dependency-version: 4.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

js/package.json

@@ -43,7 +43,7 @@
   },
   "dependencies": {
     "@jupyterlab/application": "^4.4.4",
-    "@jupyterlab/apputils": "^4.5.5",
+    "@jupyterlab/apputils": "^4.5.7",
     "@jupyterlab/notebook": "^4.4.6",
     "@jupyterlab/services": "^7.4.4",
     "@lumino/disposable": "^2.1.4"