There's a merged pull request on the void-packages repository

.github/workflows/stale.yml: fix format of exempt-issue-labels
https://github.com/void-linux/void-packages/pull/38499

Description:
#38272 used wrong format, and now the action is failing - https://github.com/void-linux/void-packages/actions/runs/2807256939

@Chocimier @classabbyamp