Fix Slack report for Nightly CI and Past CI
# What does this PR do?

For these 2 CI, so for we get 

```bash
Single |  Multi | Category
     0 |      0 | [Errored out] Examples directory
     0 |      0 | [Errored out] PyTorch pipelines
     0 |      0 | [Errored out] TensorFlow pipelines
     ...
```
But they don't have these 3 jobs in their workflow. We just need to update the notification script.
_The documentation is not available anymore as the PR was closed or merged._