chore: fix artifact workflow

.github/workflows/build-pr-artifacts.yml

@@ -24,7 +24,7 @@ jobs:
         run: |
           # Perform input validation here
           # For example, check for forbidden characters
-          if [[ "${{ github.head_ref }}" =~ [^a-zA-Z0-9._-] ]]; then
+          if [[ "${{ github.head_ref }}" =~ [^a-zA-Z0-9._-/] ]]; then
             echo "Error: Branch name contains invalid characters."
             exit 1
           fi