Bump @jupyterlab/services from 6.6.7 to 7.0.11 in /packages/core

Bumps [@jupyterlab/services](https://github.com/jupyterlab/jupyterlab) from 6.6.7 to 7.0.11.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/[email protected]...@jupyterlab/[email protected])

---
updated-dependencies:
- dependency-name: "@jupyterlab/services"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

packages/core/package.json

@@ -33,7 +33,7 @@
     },
     "dependencies": {
         "@jupyterlab/coreutils": "~5.5.3",
-        "@jupyterlab/services": "^6.5.3"
+        "@jupyterlab/services": "^7.0.11"
     },
     "devDependencies": {
         "@types/node": "^14.14.37",