Add version of ComfyUI to the saving workflow file

### Feature Idea

Why not add version of ComfyUI to the saving workflow file?

(
To be clear, yes, i found the version in the workflow.json file but it is always: {"version": 0.4}
And i don't know if it is a bug or not. Because there is no version 0.4 for ComfyUI(there is only 0.0.4) and as i said, that seems it is always 0.4 for different versions of ComfyUI.
)

Anyway:
I found a community that users shared their workflows for ComfyUI there and there were some shining workflows to use for my purposes. But some/many of nodes were red after loading them to the ComfyUI 0.2.2(latest version in this time). There were missing/undefined node types due to using the old versions of ComfyUI by workflow providers. I thought that if there was version of used ComfyUI in that workflow files(in the workflow file when i open it via notepad or when the ComfyUI shows me the missing popup message), i could download that version of ComfyUI from Github release page and load workflows there to use. This can be easier way than "editing that workflow to solve problems" for some users and situations.

Beside that, isn't it standard if the version of ComfyUI be in the workflow file?

### Existing Solutions

_No response_

### Other

_No response_