ci: fix coverage upload action params

Author: szkiba

.github/workflows/test.yml

@@ -38,7 +38,7 @@ jobs:
         uses: codecov/[email protected]
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          slug: grafana/k6pack
+          slug: grafana/k6deps
 
       - name: Generate Go Report Card
         if: ${{ matrix.platform == 'ubuntu-latest' && github.ref_name == 'main' }}