Bump node-fetch from 2.6.7 to 2.6.8 (#4372)

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.7 to 2.6.8.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.7...v2.6.8)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -75,7 +75,7 @@
   ],
   "dependencies": {
     "@vscode/extension-telemetry": "^0.6.2",
-    "node-fetch": "~2.6.7",
+    "node-fetch": "~2.6.8",
     "semver": "~7.3.8",
     "uuid": "~9.0.0",
     "vscode-languageclient": "~8.0.2",