Bump CLI Version to v2.12.1 for integration tests (#1999)

Author: github-actions[bot]

extensions/ql-vscode/supported_cli_versions.json

@@ -1,6 +1,7 @@
 [
-  "v2.12.0",
+  "v2.12.1",
   "v2.11.6",
+  "v2.7.6",
   "v2.8.5",
   "v2.9.4",
   "v2.10.5",