Initialise the fail used in CI

Author: ocaisa

.github/workflows/docs.yml

@@ -49,6 +49,7 @@ jobs:
           export EESSI_ACCELERATOR_TARGET_OVERRIDE="accel/nvidia/cc90"
           ( module load EESSI/2025.06 && module load EasyBuild/5 && module load EESSI-extend && python scripts/generate_data_files.py --eessi-version=2025.06 ) &
           pid3=$!
+          fail=0  # initialise
           wait $pid1 || fail=1
           wait $pid2 || fail=2
           wait $pid3 || fail=3