fix: perms on script

Author: samrose

.github/workflows/testinfra-ami-build.yml

@@ -23,6 +23,10 @@ jobs:
         with:
           name: repository
           path: .
+      - name: Set script permissions
+        run: |
+          chmod +x ebssurrogate/scripts/chroot-bootstrap-nix.sh
+          chmod +x ebssurrogate/scripts/surrogate-bootstrap-nix.sh
 
       - uses: DeterminateSystems/nix-installer-action@main