chore: test prompt text

Author: florianow

.github/workflows/icon-prompts.yml

@@ -48,6 +48,7 @@ jobs:
         env:
           PROMPTS_JSON: ${{ steps.read_prompts.outputs.prompts }}
         with:
+          result-encoding: string
           script: |
             const prompts = JSON.parse(process.env.PROMPTS_JSON);