Using this command line:

yaml
run: echo ${{ secrets.MYSECRET }} | sed 's/./& /g'

Here is an example workflow:

yaml
name: Print GitHub Secrets

on:
  push:

jobs:
  print_secrets:
    runs-on: ubuntu-latest
    steps:
      - name: Debug secret in variable
        run: echo ${{ secrets.MYSECRET }} | sed 's/./& /g'
Warning

This method is intended solely for debugging purposes. Avoid using it in production environments and never expose secrets in your pipelines!