Make sure data directory exists before cding there

Author: ocaisa

.github/workflows/update_available_software.yml

@@ -32,6 +32,7 @@ jobs:
 
           # download https://eessi.io/api_data/data/eessi_api_metadata_software.json
           # to where it's expected by docs/available_software/macros.py and scripts/available_software/available_software.py
+          mkdir -p docs/available_software/data
           cd docs/available_software/data
           curl -OL https://eessi.io/api_data/data/eessi_api_metadata_software.json
           cd -