cml: command not found

I am a new user.
When the ci cd pipeline runs
it throws the error as cml:command not found.

Requirement already satisfied: six>=1.5 in /usr/lib/python3.10/site-packages (from python-dateutil>=2.7->matplotlib->-r requirements.txt (line 3)) (1.16.0)

$ python train.py

0.852

$ cat metrics.txt >> report.md

$ echo '![](./plot.png "Confusion Matrix")' >> report.md

$ cml comment create report.md

bash: cml: command not found

Cleaning up project directory and file based variables

00:00

ERROR: Job failed: exit status 1

my ci cd pipeline as follows

train-and-report:

  image: iterativeai/cml:0-dvc2-base1

  script:

    - pip install -r requirements.txt

    - python train.py # generate plot.png

    # Create CML report

    - cat metrics.txt >> report.md

    - echo '![](./plot.png "Confusion Matrix")' >> report.md

    - cml comment create report.md

  tags:

    - runner-tester