ci(*): Add comment for the pinned node version (#3463)

Co-authored-by: Bryce Kalow <[email protected]>

Author: panteliselef

.github/actions/init/action.yml

@@ -4,7 +4,7 @@ inputs:
   node-version:
     description: 'The node version to use'
     required: false
-    default: '18.20.2'
+    default: '18.20.2' # This is pinned to `18.20.2` because `18.20.3` bumps npm from `10.5.0` to `10.7.0`, which causes our verdaccio setup to fail (see SDK-1793).
   playwright-enabled:
     description: 'Enable Playwright?'
     required: false