Update recipe.yaml

Added the following 4 Alma9-based Docker images for machine learning:

• 'https://registry.hub.docker.com/yesw2000/ml-base:alma9-python39'
• 'https://registry.hub.docker.com/yesw2000/ml-pyroot:alma9-python39'
• 'https://registry.hub.docker.com/yesw2000/ml-tensorflow-cpu:alma9-python39'
• 'https://registry.hub.docker.com/yesw2000/ml-tensorflow-gpu:alma9-python39'