ci: try to fix

Author: paulmillr

.github/workflows/test-slow.yml

@@ -26,6 +26,7 @@ jobs:
     runs-on: ubuntu-24.04
     needs: ['setup-node']
     steps:
+      - run: cd ${GITHUB_ACTION_PATH}
       - run: npm run test:big
   acvp:
     name: Tests against slow ACVP vectors