Channels info missing in meta.yaml file docs

[debayangg]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

While writing a conda build recipe I had a dependency on conda package in conda-forge channel. I wrote the following :
run:
- python ==3.10
- numpy >=1.21.2
- pyqt >=5.15.10
- conda-forge::pythonocc-core

And it worked. Is the documentation missing this technique and if not why did this work?

Additional Context

No response