Bump vscode-languageclient from 8.1.0 to 9.0.1 in /client

Bumps [vscode-languageclient](https://github.com/Microsoft/vscode-languageserver-node/tree/HEAD/client) from 8.1.0 to 9.0.1.
- [Commits](https://github.com/Microsoft/vscode-languageserver-node/commits/release/client/9.0.1/client)

---
updated-dependencies:
- dependency-name: vscode-languageclient
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

client/package.json

@@ -28,7 +28,7 @@
         "lodash": "^4.17.21",
         "node-yaml-parser": "^0.0.9",
         "semver": "^7.5.4",
-        "vscode-languageclient": "~8.1.0",
+        "vscode-languageclient": "~9.0.1",
         "vscode-uri": "^3.0.8"
     }
 }