getting this error when merge with master

[Nishitsuthar]

getting an error from workflow

When I merge my changes with the master (which has protection rule) and workflow throw an error /home/runner/work/_temp/69da30f1-2883-4fbc-9bf3-cae84ad97f70.sh: line 39: timestamp:: command not found

Expected behavior
It should send an notification to slack that your changes are merged

Screenshots

Code

name: Slack Notification

on:
  push:
  pull_request:
  issues:
    types: [opened, closed, reopened, edited, deleted, pinned, unpinned, assigned, unassigned, labeled, unlabeled, milestoned, demilestoned]
  issue_comment:
    types: [created, edited, deleted]
  create:
  delete:

permissions:
  contents: read
  actions: read

jobs:
  notify_slack:
    runs-on: ubuntu-latest
    steps:
    - name: Debug Print Event
      run: |
        echo "Event Name: ${{ github.event_name }}"
        echo "Event JSON: ${{ toJson(github.event) }}"
    - name: Send Slack notification
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
      uses: 8398a7/action-slack@v3
      with:
        icon_emoji: ':octocat:'
        status: custom
        fields: repo,commit,event,action,workflow,ref,url
        custom_payload: |
          {
            "attachments": [
              {
                "color": "${{ job.status }}",
                "title": "${{ github.actor }} ${{ github.event.pull_request && github.event.pull_request.merged == true && 'merged a pull request' || github.event.pull_request && 'opened a pull request' || github.event_name == 'push' && 'pushed new changes' || github.event_name == 'create' && 'created a new branch or tag' || github.event_name == 'delete' && 'deleted a branch or tag' || github.event_name == 'issues' && github.event.action || 'triggered an event' }}",
                "text": ":tada: Event details:\n\n- Repository: ${{ github.repository }}\n- Branch: ${{ github.ref }}\n- Message: ${{ github.event_name == 'push' && github.event.head_commit.message || github.event_name == 'issues' && github.event.issue.title || github.event_name == 'pull_request' && github.event.pull_request.title || '' }}\n- :globe_with_meridians: Link: ${{ github.event.pull_request.html_url || github.event.issue.html_url || github.event.repository.html_url }}"
              }
            ]
          }