Update end-to-end-test-futurehouse.yaml

Author: KRRT7

.github/workflows/end-to-end-test-futurehouse.yaml

@@ -34,6 +34,7 @@ jobs:
           fetch-depth: 0
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Validate PR
+        shell: bash
         run: |
           # Check for any workflow changes
           if git diff --name-only "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}" | grep -q "^.github/workflows/"; then