Revert "Bump @octokit/plugin-retry from 4.1.6 to 6.0.0 in /extensions/ql-vscode (#2602)"

This reverts commit e938a6a.

Author: koesie10

extensions/ql-vscode/package-lock.json

@@ -1759,7 +1759,7 @@
     "prepare": "cd ../.. && husky install"
   },
   "dependencies": {
-    "@octokit/plugin-retry": "^6.0.0",
+    "@octokit/plugin-retry": "^4.1.6",
     "@octokit/rest": "^19.0.4",
     "@vscode/codicons": "^0.0.31",
     "@vscode/debugadapter": "^1.59.0",