Update hash-files.yml

Author: Torwent

.github/workflows/hash-files.yml

@@ -35,6 +35,7 @@ jobs:
           path: ./wasp-data
 
       - name: Hash all eligible files
+        shell: bash
         run: |
           ls -a
           ./Simba-Win64.exe --run ./tools/hash-files.simba