Update the CLI versions to run integration tests against

.github/workflows/main.yml

@@ -151,7 +151,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        version: ['v2.2.6', 'v2.3.3', 'v2.4.6', 'v2.5.8', 'nightly']
+        version: ['v2.2.6', 'v2.3.3', 'v2.4.6', 'v2.5.9', 'nightly']
     env:
       CLI_VERSION: ${{ matrix.version }}
       NIGHTLY_URL: ${{ needs.find-nightly.outputs.url }}

extensions/ql-vscode/src/vscode-tests/ensureCli.ts

@@ -44,7 +44,7 @@ const _10MB = _1MB * 10;
 
 // CLI version to test. Hard code the latest as default. And be sure
 // to update the env if it is not otherwise set.
-const CLI_VERSION = process.env.CLI_VERSION || 'v2.5.8';
+const CLI_VERSION = process.env.CLI_VERSION || 'v2.5.9';
 process.env.CLI_VERSION = CLI_VERSION;
 
 // Base dir where CLIs will be downloaded into