Bump CLI version from v2.20.1 to v2.20.2 for integration tests

Author: github-actions[bot]

extensions/ql-vscode/supported_cli_versions.json

@@ -1,4 +1,5 @@
 [
+  "v2.20.2",
   "v2.20.1",
   "v2.19.4",
   "v2.19.3",