ci: Print ESLint version before running script

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2821>

.gitlab-ci/run-eslint

@@ -1,6 +1,9 @@
 #!/usr/bin/env node
 
 const { ESLint } = require('eslint');
+
+console.log(`Running ESLint version ${ESLint.version}...`);
+
 const fs = require('fs');
 const path = require('path');
 const { spawn } = require('child_process');