Bump CLI Version to v2.12.0 for integration tests (#1995)

Author: github-actions[bot]

extensions/ql-vscode/supported_cli_versions.json

@@ -1 +1,8 @@
-["v2.11.6", "v2.7.6", "v2.8.5", "v2.9.4", "v2.10.5", "nightly"]
+[
+  "v2.12.0",
+  "v2.11.6",
+  "v2.8.5",
+  "v2.9.4",
+  "v2.10.5",
+  "nightly"
+]