Bump tar from 6.1.6 to 6.1.9 in /extensions/notebook (#16959)

Bumps [tar](https://github.com/npm/node-tar) from 6.1.6 to 6.1.9.
- [Release notes](https://github.com/npm/node-tar/releases)
- [Changelog](https://github.com/npm/node-tar/blob/main/CHANGELOG.md)
- [Commits](https://github.com/npm/node-tar/compare/v6.1.6...v6.1.9)

---
updated-dependencies:
- dependency-name: tar
  dependency-type: direct:production
...

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extensions/notebook/package.json

@@ -660,7 +660,7 @@
     "js-yaml": "^3.12.1",
     "node-fetch": "^2.6.1",
     "request": "^2.88.0",
-    "tar": "^6.1.6",
+    "tar": "^6.1.9",
     "vscode-languageclient": "^5.3.0-next.1",
     "vscode-nls": "^4.0.0",
     "ws": "^7.2.0"