comfy update: No such option '--version'.

**Describe the bug**
README mentions, it is able to use '--version' option to install a specific comfy ui version:
```
comfy update comfy --version
```
However, it throws out "No such option '--version'."

**To Reproduce**
Use comfy-cli version 1.13.0
put `comfy update comfy --version nightly`
comfy-cli will report `No such option '--version'.`

**Expected behavior**
Do the installation to the specified version.

**Additional context**
If this is no longer supported, the instruction relate to this option should be removed from README.