workflow: create data directory if needed

Signed-off-by: Aurélien Bombo <[email protected]>

Author: sprt

.github/workflows/fetch-ci-nightly-data.yaml

@@ -22,6 +22,7 @@ jobs:
           # back out whatever data was there
           git reset HEAD~1
           # overwrite the old data
+          mkdir -p data/
           mv tmp-data.js data/ci-nightly-data.js
           # commit
           git add data